State legislative incumbents in contested primaries, 2024

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Last updated on November 5, 2024

There were 5,807 state legislative seats up for election on November 5, 2024, in 44 states. Overall, 4,853 incumbents filed for re-election and were running at the time of their respective primaries. Of that total, 1,039 incumbents faced contested primaries, representing 21% of all incumbents who filed for re-election. This was roughly average compared to previous years, down from 27% in 2022 but higher than the 20% in 2020.

A primary is contested when there are more candidates running than nominations available. When this occurs, and an incumbent is present, it means the incumbent could possibly lose the primary. Learn more about the terms and methodologies used in this analysis.

Ballotpedia uses the number and percentage of incumbents in contested primaries to help determine the overall competitiveness of an election cycle. A larger number of contested primaries indicates more opportunities for voters to elect a non-incumbent to office. A smaller number indicates fewer of those opportunities.

In 2024:

There were 365 Democratic incumbents in contested primaries, representing 17% of all Democratic incumbents who filed for re-election, a 26% decrease from 2020.

There were 674 Republican incumbents in contested primaries, representing 26% of all Republican incumbents who filed for re-election, a 32% increase from 2020.

The total number of incumbents in contested primaries—1,039—was higher than in 2020 (1,006), the last time all 44 states held elections, representing a 3% increase.

State legislative incumbents in contested primaries, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	4,712	1,813	289	15.9%	2,158	551	25.5%	3,982	840	21.1%
Senate	1,095	403	76	18.9%	468	123	26.3%	871	199	22.8%
Total	5,807	2,216	365	16.5%	2,626	674	25.7%	4,853	1,039	21.4%

Click [show] on the table below to view incumbents in contested primaries statistics by state in 2024. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries, 2024
State	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
Nationwide	5,807	2,216	365	16.5%	2,626	674	25.7%	4,853	1,039	21.4%
Alaska	50	17	0	0.0%	21	1	4.8%	43	1	2.3%
Arizona	90	35	14	40.0%	35	18	51.4%	70	32	45.7%
Arkansas	118	15	4	26.7%	90	6	6.7%	105	10	9.5%
California	100	51	22	43.1%	15	5	33.3%	66	27	40.9%
Colorado	83	44	4	9.1%	15	3	20.0%	59	7	11.9%
Connecticut	187	115	9	7.8%	61	0	0.0%	176	9	5.1%
Delaware	51	29	5	17.2%	17	2	11.8%	46	7	15.2%
Florida	140	35	8	22.9%	74	5	6.8%	109	13	11.9%
Georgia	236	91	22	24.2%	129	21	16.3%	220	43	19.5%
Hawaii	63	51	18	35.3%	7	1	14.3%	58	19	32.8%
Idaho	105	17	2	11.8%	83	47	56.6%	100	49	49.0%
Illinois	138	92	14	15.2%	40	5	12.5%	132	19	14.4%
Indiana	125	36	5	13.9%	80	24	30.0%	116	29	25.0%
Iowa	125	37	2	5.4%	72	5	6.9%	109	7	6.4%
Kansas	165	47	3	6.4%	87	14	16.1%	134	17	12.7%
Kentucky	119	19	6	31.6%	84	18	21.4%	103	24	23.3%
Maine	186	81	3	3.7%	65	3	4.6%	147	6	4.1%
Massachusetts	200	154	16	10.4%	26	2	7.7%	181	18	9.9%
Michigan	110	52	17	32.7%	50	18	36.0%	102	35	34.3%
Minnesota	134	60	1	1.7%	54	6	11.1%	114	7	6.1%
Missouri	180	35	6	17.1%	88	20	22.7%	123	26	21.1%
Montana	125	24	2	8.3%	51	22	43.1%	75	24	32.0%
Nebraska	25	4	2	50.0%	6	3	50.0%	10	5	50.0%
Nevada	52	23	5	21.7%	14	3	21.4%	37	8	21.6%
New Hampshire	424	158	23	14.6%	171	63	36.8%	329	86	26.1%
New Mexico	112	65	17	26.2%	28	5	17.9%	93	22	23.7%
New York	213	129	17	13.2%	66	1	1.5%	195	18	9.2%
North Carolina	170	58	8	13.8%	91	11	12.1%	149	19	12.8%
North Dakota	69	4	0	0.0%	48	20	41.7%	52	20	38.5%
Ohio	115	25	4	16.0%	62	20	32.3%	87	24	27.6%
Oklahoma	125	18	1	5.6%	85	28	32.9%	103	29	28.2%
Oregon	75	35	5	14.3%	26	6	23.1%	61	11	18.0%
Pennsylvania	228	107	9	8.4%	105	12	11.4%	212	21	9.9%
Rhode Island	113	92	12	13.0%	11	0	0.0%	104	12	11.5%
South Carolina	170	46	16	34.8%	104	35	33.7%	150	51	34.0%
South Dakota	105	8	1	12.5%	61	41	67.2%	69	42	60.9%
Tennessee	115	24	8	33.3%	83	20	24.1%	107	28	26.2%
Texas	165	65	14	21.5%	83	46	55.4%	148	60	40.5%
Utah	89	14	1	7.1%	60	11	18.3%	74	12	16.2%
Vermont	180	103	19	18.4%	34	1	2.9%	140	20	14.3%
Washington	123	61	15	24.6%	36	9	25.0%	97	24	24.7%
West Virginia	117	8	0	0.0%	90	30	33.3%	98	30	30.6%
Wisconsin	115	27	5	18.5%	62	23	37.1%	89	28	31.5%
Wyoming	77	5	0	0.0%	56	40	71.4%	61	40	65.6%

Historical comparison

The chart below shows a breakdown of incumbents in contested primaries from 2010 to 2024.

Click [show] on the table below to view overall incumbents in contested primaries statistics by state from 2010 to 2024. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries, 2010-2024
State
	2010		2012		2014		2016		2018		2020		2022		2024
	Cont.	%	Cont.	%	Cont.	%	Cont.	%	Cont.	%	Cont.	%	Cont.	%	Cont.	%
Nationwide	995	20.0%	1,117	23.3%	983	19.5%	985	20.2%	1,082	22.2%	1,006	20.1%	1,299	26.8%	1,039	21.4%
Alaska	6	13.3%	16	29.6%	4	8.5%	12	29.3%	11	29.7%	19	40.4%	0	0.0%	1	2.3%
Arizona	26	51.0%	24	40.0%	28	42.4%	19	29.7%	27	47.4%	27	37.0%	26	52.0%	32	45.7%
Arkansas	4	6.3%	12	13.6%	8	9.2%	10	9.8%	15	15.8%	11	10.3%	29	27.9%	10	9.5%
California	6	9.7%	22	39.3%	23	34.3%	25	33.8%	37	43.0%	37	43.0%	32	46.4%	27	40.9%
Colorado	1	1.6%	4	7.5%	2	3.4%	5	8.5%	5	8.8%	5	7.9%	7	14.0%	7	11.9%
Connecticut	10	6.0%	7	4.3%	9	5.5%	10	6.1%	5	3.1%	5	2.9%	4	2.5%	9	5.1%
Delaware	7	14.6%	11	20.8%	9	18.4%	6	12.0%	3	8.1%	7	14.0%	8	14.5%	7	15.2%
Florida	18	18.6%	31	28.2%	21	17.2%	14	14.3%	19	18.6%	17	17.0%	32	28.1%	13	11.9%
Georgia	41	20.7%	48	22.9%	47	21.5%	49	22.9%	53	24.5%	42	20.0%	63	33.5%	43	19.5%
Hawaii	24	41.4%	26	36.6%	20	34.5%	24	39.3%	23	42.6%	20	35.7%	25	39.7%	19	32.8%
Idaho	26	27.1%	34	48.6%	30	31.9%	31	32.3%	31	34.8%	28	32.2%	45	60.8%	49	49.0%
Illinois	21	16.5%	33	22.8%	14	11.2%	17	11.8%	17	13.2%	22	18.0%	25	16.1%	19	14.4%
Indiana	21	18.6%	17	16.5%	11	9.4%	17	15.7%	23	20.7%	23	20.0%	30	26.3%	29	25.0%
Iowa	8	7.4%	16	16.0%	8	7.3%	9	8.0%	5	4.9%	6	5.6%	14	15.1%	7	6.4%
Kansas	23	20.0%	54	42.5%	21	18.8%	39	29.5%	26	23.2%	31	21.8%	16	15.7%	17	12.7%
Kentucky	21	18.8%	22	20.8%	15	13.9%	16	14.7%	19	19.4%	13	12.7%	31	31.0%	24	23.3%
Maine	4	2.8%	5	4.1%	3	2.2%	4	2.7%	2	1.5%	7	4.7%	3	2.6%	6	4.1%
Massachusetts	14	8.4%	19	10.0%	17	9.6%	20	10.7%	20	11.4%	23	12.4%	21	11.9%	18	9.9%
Michigan	17	25.0%	37	40.2%	28	28.9%	23	33.8%	23	29.5%	24	28.6%	44	52.4%	35	34.3%
Minnesota	8	4.5%	11	7.1%	5	4.2%	11	6.4%	7	6.3%	19	10.4%	20	14.1%	7	6.1%
Missouri	15	14.3%	35	27.8%	22	15.0%	21	14.8%	19	16.2%	17	13.8%	35	26.5%	26	21.1%
Montana	11	14.7%	17	20.7%	18	22.5%	14	17.5%	10	11.2%	23	27.4%	13	15.1%	24	32.0%
Nebraska	6	28.6%	4	25.0%	1	14.3%	4	28.6%	5	31.3%	2	10.5%	6	54.5%	5	50.0%
Nevada	5	19.2%	12	33.3%	13	30.2%	17	41.5%	8	21.1%	7	17.9%	13	38.2%	8	21.6%
New Hampshire	124	38.5%	145	46.0%	104	33.2%	125	40.7%	87	27.2%	100	29.1%	116	38.4%	86	26.1%
New Mexico	14	20.9%	24	26.4%	7	11.9%	9	8.8%	6	9.8%	20	19.8%	12	20.7%	22	23.7%
New York	37	19.8%	33	17.5%	27	14.1%	33	17.0%	31	15.9%	35	19.4%	46	24.1%	18	9.2%
North Carolina	39	25.7%	37	29.1%	29	18.6%	31	20.7%	39	25.5%	24	16.7%	33	22.9%	19	12.8%
North Dakota	2	3.5%	10	16.4%	4	6.8%	7	13.0%	6	10.0%	5	7.9%	27	36.0%	20	38.5%
Ohio	14	16.1%	14	14.3%	23	25.6%	14	16.3%	20	27.0%	14	15.2%	20	23.3%	24	27.6%
Oklahoma	12	11.7%	19	18.6%	13	13.7%	28	33.3%	37	45.1%	33	28.9%	26	24.8%	29	28.2%
Oregon	9	13.0%	4	6.1%	6	10.0%	4	6.9%	9	13.8%	5	8.3%	9	17.6%	11	18.0%
Pennsylvania	29	14.0%	32	15.8%	42	20.7%	28	13.4%	22	11.2%	28	13.4%	42	22.1%	21	9.9%
Rhode Island	34	34.7%	26	26.0%	18	17.1%	18	17.1%	20	20.4%	26	25.0%	30	30.3%	12	11.5%
South Carolina	26	23.2%	23	15.5%	20	17.4%	42	27.5%	36	31.0%	36	23.1%	34	30.6%	51	34.0%
South Dakota	7	9.9%	25	33.8%	17	23.0%	18	28.6%	20	25.3%	25	32.9%	35	49.3%	42	60.9%
Tennessee	12	11.3%	35	35.7%	25	24.0%	34	31.2%	24	27.0%	27	24.8%	15	15.2%	28	26.2%
Texas	28	17.8%	51	34.7%	39	26.0%	46	30.7%	50	33.1%	32	20.6%	45	29.6%	60	40.5%
Utah	9	11.1%	14	17.9%	4	5.2%	6	7.9%	3	4.6%	12	15.6%	15	18.3%	12	16.2%
Vermont	13	8.2%	12	7.7%	8	5.2%	27	17.8%	19	12.8%	26	16.5%	18	14.4%	20	14.3%
Washington	24	23.3%	15	15.3%	23	20.7%	32	31.1%	34	32.1%	38	35.5%	31	32.3%	24	24.7%
West Virginia	52	50.5%	45	45.9%	34	32.1%	38	40.9%	40	40.4%	45	48.4%	36	36.7%	30	30.6%
Wisconsin	13	14.0%	15	16.0%	3	3.4%	8	7.8%	4	4.0%	9	9.5%	9	10.5%	28	31.5%
Wyoming	15	25.0%	21	35.0%	26	40.6%	20	36.4%	19	29.2%	31	51.7%	28	49.1%	40	65.6%

Alaska

There were 50 seats up for election in Alaska. A total of 43 incumbents filed for re-election: 17 Democrats, 21 Republicans, and five minor party or independent incumbents. Of that total, one Republican incumbent faced contested primaries, representing 2.3% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Alaska, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	40	12	0	0.0%	17	0	0.0%	34	0	0.0%
Senate	10	5	0	0.0%	4	1	25.0%	9	1	11.1%
Total	50	17	0	0.0%	21	1	4.8%	43	1	2.3%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Alaska, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	50	22	1	4.5%	23	5	21.7%	45	6	13.3%
2012	59	21	3	14.3%	32	13	40.6%	54	16	29.6%
2014	54	18	1	5.6%	29	3	10.3%	47	4	8.5%
2016	50	18	2	11.1%	22	10	45.5%	41	12	29.3%
2018	50	14	0	0.0%	21	11	52.4%	37	11	29.7%
2020	50	17	2	11.8%	28	17	60.7%	47	19	40.4%
2022	59	12	0	0.0%	24	0	0.0%	40	0	0.0%
2024	50	17	0	0.0%	21	1	4.8%	43	1	2.3%

See also:

• Alaska House of Representatives elections, 2024
• Alaska State Senate elections, 2024

Arizona

There were 90 seats up for election in Arizona. A total of 70 incumbents filed for re-election: 35 Democrats and 35 Republicans. Of that total, 32 incumbents—14 Democrats and 18 Republicans—faced contested primaries, representing 45.7% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Arizona, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	60	23	12	52.2%	22	13	59.1%	45	25	55.6%
Senate	30	12	2	16.7%	13	5	38.5%	25	7	28.0%
Total	90	35	14	40.0%	35	18	51.4%	70	32	45.7%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Arizona, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	90	20	7	35.0%	31	19	61.3%	51	26	51.0%
2012	90	17	11	64.7%	43	13	30.2%	60	24	40.0%
2014	90	27	6	22.2%	39	22	56.4%	66	28	42.4%
2016	90	26	11	42.3%	38	8	21.1%	64	19	29.7%
2018	90	24	8	33.3%	33	19	57.6%	57	27	47.4%
2020	90	37	13	35.1%	36	14	38.9%	73	27	37.0%
2022	90	21	9	42.9%	29	17	58.6%	50	26	52.0%
2024	90	35	14	40.0%	35	18	51.4%	70	32	45.7%

See also:

• Arizona House of Representatives elections, 2024
• Arizona State Senate elections, 2024

Arkansas

There were 118 seats up for election in Arkansas. A total of 105 incumbents filed for re-election: 15 Democrats and 90 Republicans. Of that total, 10 incumbents—four Democrats and six Republicans—faced contested primaries, representing 9.5% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Arkansas, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	100	14	4	28.6%	74	4	5.4%	88	8	9.1%
Senate	18	1	0	0.0%	16	2	12.5%	17	2	11.8%
Total	118	15	4	26.7%	90	6	6.7%	105	10	9.5%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Arkansas, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	117	42	3	7.1%	22	1	4.5%	64	4	6.3%
2012	135	40	6	15.0%	48	6	12.5%	88	12	13.6%
2014	118	44	1	2.3%	43	7	16.3%	87	8	9.2%
2016	117	36	2	5.6%	66	8	12.1%	102	10	9.8%
2018	118	21	4	19.0%	73	11	15.1%	95	15	15.8%
2020	117	27	3	11.1%	80	8	10.0%	107	11	10.3%
2022	135	22	3	13.6%	82	26	31.7%	104	29	27.9%
2024	118	15	4	26.7%	90	6	6.7%	105	10	9.5%

See also:

• Arkansas House of Representatives elections, 2024
• Arkansas State Senate elections, 2024

California

There were 100 seats up for election in California. A total of 66 incumbents filed for re-election: 51 Democrats and 15 Republicans. Of that total, 27 incumbents—22 Democrats and five Republicans—faced contested primaries, representing 40.9% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in California, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	80	43	15	34.9%	14	5	35.7%	57	20	35.1%
Senate	20	8	7	87.5%	1	0	0.0%	9	7	77.8%
Total	100	51	22	43.1%	15	5	33.3%	66	27	40.9%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in California, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	100	44	3	6.8%	18	3	16.7%	62	6	9.7%
2012	100	36	15	41.7%	20	7	35.0%	56	22	39.3%
2014	100	45	19	42.2%	22	4	18.2%	67	23	34.3%
2016	100	51	15	29.4%	23	10	43.5%	74	25	33.8%
2018	100	59	25	42.4%	27	12	44.4%	86	37	43.0%
2020	100	65	25	38.5%	20	11	55.0%	86	37	43.0%
2022	100	53	25	47.2%	16	7	43.8%	69	32	46.4%
2024	100	51	22	43.1%	15	5	33.3%	66	27	40.9%

See also:

• California State Assembly elections, 2024
• California State Senate elections, 2024

Colorado

There were 83 seats up for election in Colorado. A total of 59 incumbents filed for re-election: 44 Democrats and 15 Republicans. Of that total, seven incumbents—four Democrats and three Republicans—faced contested primaries, representing 11.9% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Colorado, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	65	37	4	10.8%	12	1	8.3%	49	5	10.2%
Senate	18	7	0	0.0%	3	2	66.7%	10	2	20.0%
Total	83	44	4	9.1%	15	3	20.0%	59	7	11.9%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Colorado, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	84	37	1	2.7%	26	0	0.0%	64	1	1.6%
2012	85	29	1	3.4%	24	3	12.5%	53	4	7.5%
2014	82	36	0	0.0%	23	2	8.7%	59	2	3.4%
2016	83	26	0	0.0%	33	5	15.2%	59	5	8.5%
2018	82	27	0	0.0%	30	5	16.7%	57	5	8.8%
2020	83	41	3	7.3%	22	2	9.1%	63	5	7.9%
2022	82	34	1	2.9%	16	6	37.5%	50	7	14.0%
2024	83	44	4	9.1%	15	3	20.0%	59	7	11.9%

See also:

• Colorado House of Representatives elections, 2024
• Colorado State Senate elections, 2024

Connecticut

There were 187 seats up for election in Connecticut. A total of 176 incumbents filed for re-election: 115 Democrats and 61 Republicans. Of that total, nine Democratic incumbents faced contested primaries, representing 5.1% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Connecticut, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	151	92	7	7.6%	49	0	0.0%	141	7	5.0%
Senate	36	23	2	8.7%	12	0	0.0%	35	2	5.7%
Total	187	115	9	7.8%	61	0	0.0%	176	9	5.1%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Connecticut, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	187	124	10	8.1%	44	0	0.0%	168	10	6.0%
2012	187	104	6	5.8%	59	1	1.7%	163	7	4.3%
2014	187	105	8	7.6%	58	1	1.7%	163	9	5.5%
2016	187	96	8	8.3%	68	2	2.9%	164	10	6.1%
2018	187	84	5	6.0%	79	0	0.0%	163	5	3.1%
2020	187	106	5	4.7%	64	0	0.0%	170	5	2.9%
2022	187	105	3	2.9%	52	1	1.9%	157	4	2.5%
2024	187	115	9	7.8%	61	0	0.0%	176	9	5.1%

See also:

• Connecticut House of Representatives elections, 2024
• Connecticut State Senate elections, 2024

Delaware

There were 51 seats up for election in Delaware. A total of 46 incumbents filed for re-election: 29 Democrats and 17 Republicans. Of that total, seven incumbents—five Democrats and two Republicans—faced contested primaries, representing 15.2% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Delaware, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	41	22	5	22.7%	14	1	7.1%	36	6	16.7%
Senate	10	7	0	0.0%	3	1	33.3%	10	1	10.0%
Total	51	29	5	17.2%	17	2	11.8%	46	7	15.2%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Delaware, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	52	32	6	18.8%	16	1	6.3%	48	7	14.6%
2012	62	35	6	17.1%	18	5	27.8%	53	11	20.8%
2014	51	31	6	19.4%	18	3	16.7%	49	9	18.4%
2016	52	31	5	16.1%	19	1	5.3%	50	6	12.0%
2018	51	21	3	14.3%	16	0	0.0%	37	3	8.1%
2020	52	30	7	23.3%	20	0	0.0%	50	7	14.0%
2022	62	35	6	17.1%	20	2	10.0%	55	8	14.5%
2024	51	29	5	17.2%	17	2	11.8%	46	7	15.2%

See also:

• Delaware House of Representatives elections, 2024
• Delaware State Senate elections, 2024

Florida

There were 140 seats up for election in Florida. A total of 109 incumbents filed for re-election: 35 Democrats and 74 Republicans. Of that total, 13 incumbents—eight Democrats and five Republicans—faced contested primaries, representing 11.9% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Florida, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	120	32	6	18.8%	65	4	6.2%	97	10	10.3%
Senate	20	3	2	66.7%	9	1	11.1%	12	3	25.0%
Total	140	35	8	22.9%	74	5	6.8%	109	13	11.9%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Florida, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	143	40	6	15.0%	57	12	21.1%	97	18	18.6%
2012	160	31	7	22.6%	79	24	30.4%	110	31	28.2%
2014	140	43	8	18.6%	79	13	16.5%	122	21	17.2%
2016	160	26	7	26.9%	72	7	9.7%	98	14	14.3%
2018	140	39	11	28.2%	63	8	12.7%	102	19	18.6%
2020	140	38	8	21.1%	62	9	14.5%	100	17	17.0%
2022	160	41	13	31.7%	73	19	26.0%	114	32	28.1%
2024	140	35	8	22.9%	74	5	6.8%	109	13	11.9%

See also:

• Florida House of Representatives elections, 2024
• Florida State Senate elections, 2024

Georgia

There were 236 seats up for election in Georgia. A total of 220 incumbents filed for re-election: 91 Democrats and 129 Republicans. Of that total, 43 incumbents—22 Democrats and 21 Republicans—faced contested primaries, representing 19.5% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Georgia, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	180	71	16	22.5%	97	15	15.5%	168	31	18.5%
Senate	56	20	6	30.0%	32	6	18.8%	52	12	23.1%
Total	236	91	22	24.2%	129	21	16.3%	220	43	19.5%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Georgia, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	236	86	19	22.1%	111	22	19.8%	198	41	20.7%
2012	236	73	25	34.2%	136	23	16.9%	210	48	22.9%
2014	236	74	17	23.0%	144	30	20.8%	219	47	21.5%
2016	236	71	19	26.8%	143	30	21.0%	214	49	22.9%
2018	236	82	27	32.9%	134	26	19.4%	216	53	24.5%
2020	236	89	28	31.5%	121	14	11.6%	210	42	20.0%
2022	236	76	27	35.5%	112	36	32.1%	188	63	33.5%
2024	236	91	22	24.2%	129	21	16.3%	220	43	19.5%

See also:

• Georgia House of Representatives elections, 2024
• Georgia State Senate elections, 2024

Hawaii

There were 63 seats up for election in Hawaii. A total of 58 incumbents filed for re-election: 51 Democrats and seven Republicans. Of that total, 19 incumbents—18 Democrats and one Republican—faced contested primaries, representing 32.8% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Hawaii, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	51	41	17	41.5%	6	1	16.7%	47	18	38.3%
Senate	12	10	1	10.0%	1	0	0.0%	11	1	9.1%
Total	63	51	18	35.3%	7	1	14.3%	58	19	32.8%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Hawaii, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	66	52	24	46.2%	6	0	0.0%	58	24	41.4%
2012	76	64	24	37.5%	7	2	28.6%	71	26	36.6%
2014	63	52	19	36.5%	6	1	16.7%	58	20	34.5%
2016	64	53	22	41.5%	8	2	25.0%	61	24	39.3%
2018	63	50	23	46.0%	4	0	0.0%	54	23	42.6%
2020	64	51	20	39.2%	5	0	0.0%	56	20	35.7%
2022	76	60	25	41.7%	3	0	0.0%	63	25	39.7%
2024	63	51	18	35.3%	7	1	14.3%	58	19	32.8%

See also:

• Hawaii House of Representatives elections, 2024
• Hawaii State Senate elections, 2024

Idaho

There were 105 seats up for election in Idaho. A total of 100 incumbents filed for re-election: 17 Democrats and 83 Republicans. Of that total, 49 incumbents—two Democrats and 47 Republicans—faced contested primaries, representing 49.0% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Idaho, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	70	10	1	10.0%	56	31	55.4%	66	32	48.5%
Senate	35	7	1	14.3%	27	16	59.3%	34	17	50.0%
Total	105	17	2	11.8%	83	47	56.6%	100	49	49.0%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Idaho, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	105	19	1	5.3%	77	25	32.5%	96	26	27.1%
2012	105	11	1	9.1%	59	33	55.9%	70	34	48.6%
2014	105	15	1	6.7%	79	29	36.7%	94	30	31.9%
2016	105	17	1	5.9%	79	30	38.0%	96	31	32.3%
2018	105	14	1	7.1%	75	30	40.0%	89	31	34.8%
2020	105	16	0	0.0%	71	28	39.4%	87	28	32.2%
2022	105	13	0	0.0%	61	45	73.8%	74	45	60.8%
2024	105	17	2	11.8%	83	47	56.6%	100	49	49.0%

See also:

• Idaho House of Representatives elections, 2024
• Idaho State Senate elections, 2024

Illinois

There were 138 seats up for election in Illinois. A total of 132 incumbents filed for re-election: 92 Democrats and 40 Republicans. Of that total, 19 incumbents—14 Democrats and five Republicans—faced contested primaries, representing 14.4% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Illinois, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	118	75	13	17.3%	38	4	10.5%	113	17	15.0%
Senate	20	17	1	5.9%	2	1	50.0%	19	2	10.5%
Total	138	92	14	15.2%	40	5	12.5%	132	19	14.4%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Illinois, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	139	76	14	18.4%	51	7	13.7%	127	21	16.5%
2012	177	82	21	25.6%	63	12	19.0%	145	33	22.8%
2014	137	82	9	11.0%	43	5	11.6%	125	14	11.2%
2016	158	92	11	12.0%	52	6	11.5%	144	17	11.8%
2018	157	77	10	13.0%	52	7	13.5%	129	17	13.2%
2020	138	84	18	21.4%	38	4	10.5%	122	22	18.0%
2022	177	103	15	14.6%	52	10	19.2%	155	25	16.1%
2024	138	92	14	15.2%	40	5	12.5%	132	19	14.4%

See also:

• Illinois House of Representatives elections, 2024
• Illinois State Senate elections, 2024

Indiana

There were 125 seats up for election in Indiana. A total of 116 incumbents filed for re-election: 36 Democrats and 80 Republicans. Of that total, 29 incumbents—five Democrats and 24 Republicans—faced contested primaries, representing 25.0% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Indiana, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	100	29	3	10.3%	63	19	30.2%	92	22	23.9%
Senate	25	7	2	28.6%	17	5	29.4%	24	7	29.2%
Total	125	36	5	13.9%	80	24	30.0%	116	29	25.0%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Indiana, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	125	56	6	10.7%	57	15	26.3%	113	21	18.6%
2012	125	35	5	14.3%	68	12	17.6%	103	17	16.5%
2014	125	36	0	0.0%	81	11	13.6%	117	11	9.4%
2016	125	30	2	6.7%	78	15	19.2%	108	17	15.7%
2018	125	28	7	25.0%	83	16	19.3%	111	23	20.7%
2020	125	34	6	17.6%	81	17	21.0%	115	23	20.0%
2022	125	32	2	6.3%	82	28	34.1%	114	30	26.3%
2024	125	36	5	13.9%	80	24	30.0%	116	29	25.0%

See also:

• Indiana House of Representatives elections, 2024
• Indiana State Senate elections, 2024

Iowa

There were 125 seats up for election in Iowa. A total of 109 incumbents filed for re-election: 37 Democrats and 72 Republicans. Of that total, seven incumbents—two Democrats and five Republicans—faced contested primaries, representing 6.4% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Iowa, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	100	32	1	3.1%	55	4	7.3%	87	5	5.7%
Senate	25	5	1	20.0%	17	1	5.9%	22	2	9.1%
Total	125	37	2	5.4%	72	5	6.9%	109	7	6.4%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Iowa, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	125	65	5	7.7%	43	3	7.0%	108	8	7.4%
2012	126	45	0	0.0%	55	16	29.1%	100	16	16.0%
2014	125	55	3	5.5%	55	5	9.1%	110	8	7.3%
2016	125	50	4	8.0%	62	5	8.1%	112	9	8.0%
2018	125	48	1	2.1%	55	4	7.3%	103	5	4.9%
2020	125	51	4	7.8%	57	2	3.5%	108	6	5.6%
2022	134	33	0	0.0%	60	14	23.3%	93	14	15.1%
2024	125	37	2	5.4%	72	5	6.9%	109	7	6.4%

See also:

• Iowa House of Representatives elections, 2024
• Iowa State Senate elections, 2024

Kansas

There were 165 seats up for election in Kansas. A total of 134 incumbents filed for re-election: 47 Democrats and 87 Republicans. Of that total, 17 incumbents—three Democrats and 14 Republicans—faced contested primaries, representing 12.7% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Kansas, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	125	37	1	2.7%	68	7	10.3%	105	8	7.6%
Senate	40	10	2	20.0%	19	7	36.8%	29	9	31.0%
Total	165	47	3	6.4%	87	14	16.1%	134	17	12.7%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Kansas, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	125	45	3	6.7%	70	20	28.6%	115	23	20.0%
2012	165	37	6	16.2%	90	48	53.3%	127	54	42.5%
2014	125	29	0	0.0%	83	21	25.3%	112	21	18.8%
2016	165	34	4	11.8%	98	35	35.7%	132	39	29.5%
2018	125	40	7	17.5%	72	19	26.4%	112	26	23.2%
2020	165	43	3	7.0%	99	28	28.3%	142	31	21.8%
2022	125	32	2	6.3%	70	14	20.0%	102	16	15.7%
2024	165	47	3	6.4%	87	14	16.1%	134	17	12.7%

See also:

• Kansas House of Representatives elections, 2024
• Kansas State Senate elections, 2024

Kentucky

There were 119 seats up for election in Kentucky. A total of 103 incumbents filed for re-election: 19 Democrats and 84 Republicans. Of that total, 24 incumbents—six Democrats and 18 Republicans—faced contested primaries, representing 23.3% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Kentucky, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	100	15	5	33.3%	73	14	19.2%	88	19	21.6%
Senate	19	4	1	25.0%	11	4	36.4%	15	5	33.3%
Total	119	19	6	31.6%	84	18	21.4%	103	24	23.3%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Kentucky, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	119	68	11	16.2%	43	10	23.3%	112	21	18.8%
2012	119	64	11	17.2%	42	11	26.2%	106	22	20.8%
2014	119	55	6	10.9%	53	9	17.0%	108	15	13.9%
2016	119	57	7	12.3%	52	9	17.3%	109	16	14.7%
2018	119	29	4	13.8%	69	15	21.7%	98	19	19.4%
2020	119	35	3	8.6%	67	10	14.9%	102	13	12.7%
2022	119	21	4	19.0%	79	27	34.2%	100	31	31.0%
2024	119	19	6	31.6%	84	18	21.4%	103	24	23.3%

See also:

• Kentucky House of Representatives elections, 2024
• Kentucky State Senate elections, 2024

Maine

There were 186 seats up for election in Maine. A total of 147 incumbents filed for re-election: 81 Democrats, 65 Republicans, and one minor party or independent incumbent. Of that total, six incumbents—three Democrats and three Republicans—faced contested primaries, representing 4.1% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Maine, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	151	62	2	3.2%	55	2	3.6%	118	4	3.4%
Senate	35	19	1	5.3%	10	1	10.0%	29	2	6.9%
Total	186	81	3	3.7%	65	3	4.6%	147	6	4.1%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Maine, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	186	94	3	3.2%	49	1	2.0%	143	4	2.8%
2012	186	54	4	7.4%	67	1	1.5%	123	5	4.1%
2014	186	85	2	2.4%	48	1	2.1%	137	3	2.2%
2016	186	69	2	2.9%	80	2	2.5%	149	4	2.7%
2018	186	74	2	2.7%	53	0	0.0%	130	2	1.5%
2020	186	82	4	4.9%	61	3	4.9%	148	7	4.7%
2022	186	68	1	1.5%	46	2	4.3%	116	3	2.6%
2024	186	81	3	3.7%	65	3	4.6%	147	6	4.1%

See also:

• Maine House of Representatives elections, 2024
• Maine State Senate elections, 2024

Massachusetts

There were 200 seats up for election in Massachusetts. A total of 181 incumbents filed for re-election: 154 Democrats, 26 Republicans, and one minor party or independent incumbent. Of that total, 18 incumbents—16 Democrats and two Republicans—faced contested primaries, representing 9.9% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Massachusetts, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	160	121	13	10.7%	22	2	9.1%	144	15	10.4%
Senate	40	33	3	9.1%	4	0	0.0%	37	3	8.1%
Total	200	154	16	10.4%	26	2	7.7%	181	18	9.9%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Massachusetts, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	200	151	14	9.3%	15	0	0.0%	166	14	8.4%
2012	200	154	18	11.7%	36	1	2.8%	190	19	10.0%
2014	200	148	16	10.8%	30	1	3.3%	178	17	9.6%
2016	200	147	19	12.9%	40	1	2.5%	187	20	10.7%
2018	200	137	19	13.9%	37	1	2.7%	176	20	11.4%
2020	200	151	22	14.6%	33	1	3.0%	185	23	12.4%
2022	200	146	20	13.7%	29	1	3.4%	176	21	11.9%
2024	200	154	16	10.4%	26	2	7.7%	181	18	9.9%

See also:

• Massachusetts House of Representatives elections, 2024
• Massachusetts State Senate elections, 2024

Michigan

There were 110 seats up for election in Michigan. A total of 102 incumbents filed for re-election: 52 Democrats and 50 Republicans. Of that total, 35 incumbents—17 Democrats and 18 Republicans—faced contested primaries, representing 34.3% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Michigan, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	110	52	17	32.7%	50	18	36.0%	102	35	34.3%
Senate	Did not hold elections
Total	110	52	17	32.7%	50	18	36.0%	102	35	34.3%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Michigan, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	148	40	10	25.0%	28	7	25.0%	68	17	25.0%
2012	110	36	19	52.8%	56	18	32.1%	92	37	40.2%
2014	148	40	9	22.5%	57	19	33.3%	97	28	28.9%
2016	110	32	14	43.8%	36	9	25.0%	68	23	33.8%
2018	148	32	14	43.8%	46	9	19.6%	78	23	29.5%
2020	110	39	14	35.9%	45	10	22.2%	84	24	28.6%
2022	148	42	18	42.9%	42	26	61.9%	84	44	52.4%
2024	110	52	17	32.7%	50	18	36.0%	102	35	34.3%

See also:

• Michigan House of Representatives elections, 2024

Minnesota

There were 134 seats up for election in Minnesota. A total of 114 incumbents filed for re-election: 60 Democrats and 54 Republicans. Of that total, seven incumbents—one Democrat and six Republicans—faced contested primaries, representing 6.1% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Minnesota, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	134	60	1	1.7%	54	6	11.1%	114	7	6.1%
Senate	Did not hold elections
Total	134	60	1	1.7%	54	6	11.1%	114	7	6.1%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Minnesota, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	201	121	5	4.1%	56	3	5.4%	177	8	4.5%
2012	201	72	7	9.7%	82	4	4.9%	154	11	7.1%
2014	134	68	4	5.9%	51	1	2.0%	119	5	4.2%
2016	201	82	7	8.5%	91	4	4.4%	173	11	6.4%
2018	134	41	5	12.2%	70	2	2.9%	111	7	6.3%
2020	201	95	11	11.6%	87	8	9.2%	182	19	10.4%
2022	201	74	8	10.8%	68	12	17.6%	142	20	14.1%
2024	134	60	1	1.7%	54	6	11.1%	114	7	6.1%

See also:

• Minnesota House of Representatives elections, 2024

Missouri

There were 180 seats up for election in Missouri. A total of 123 incumbents filed for re-election: 35 Democrats and 88 Republicans. Of that total, 26 incumbents—six Democrats and 20 Republicans—faced contested primaries, representing 21.1% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Missouri, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	163	31	4	12.9%	85	18	21.2%	116	22	19.0%
Senate	17	4	2	50.0%	3	2	66.7%	7	4	57.1%
Total	180	35	6	17.1%	88	20	22.7%	123	26	21.1%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Missouri, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	180	55	8	14.5%	50	7	14.0%	105	15	14.3%
2012	180	43	19	44.2%	83	16	19.3%	126	35	27.8%
2014	180	47	8	17.0%	100	14	14.0%	147	22	15.0%
2016	180	35	7	20.0%	106	14	13.2%	142	21	14.8%
2018	180	34	7	20.6%	83	12	14.5%	117	19	16.2%
2020	180	36	9	25.0%	87	8	9.2%	123	17	13.8%
2022	180	46	13	28.3%	86	22	25.6%	132	35	26.5%
2024	180	35	6	17.1%	88	20	22.7%	123	26	21.1%

See also:

• Missouri House of Representatives elections, 2024
• Missouri State Senate elections, 2024

Montana

There were 125 seats up for election in Montana. A total of 75 incumbents filed for re-election: 24 Democrats and 51 Republicans. Of that total, 24 incumbents—two Democrats and 22 Republicans—faced contested primaries, representing 32.0% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Montana, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	100	22	2	9.1%	45	19	42.2%	67	21	31.3%
Senate	25	2	0	0.0%	6	3	50.0%	8	3	37.5%
Total	125	24	2	8.3%	51	22	43.1%	75	24	32.0%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Montana, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	126	34	3	8.8%	41	8	19.5%	75	11	14.7%
2012	126	26	3	11.5%	56	14	25.0%	82	17	20.7%
2014	125	32	3	9.4%	48	15	31.3%	80	18	22.5%
2016	125	36	1	2.8%	44	13	29.5%	80	14	17.5%
2018	125	34	1	2.9%	55	9	16.4%	89	10	11.2%
2020	125	31	4	12.9%	53	19	35.8%	84	23	27.4%
2022	125	29	4	13.8%	57	9	15.8%	86	13	15.1%
2024	125	24	2	8.3%	51	22	43.1%	75	24	32.0%

See also:

• Montana House of Representatives elections, 2024
• Montana State Senate elections, 2024

Nebraska

There were 25 seats up for election in Nebraska. A total of 10 incumbents filed for re-election: four Democrats and six Republicans. Of that total, five incumbents—two Democrats and three Republicans—faced contested primaries, representing 50.0% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Nebraska, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	N/A
Senate	25	4	2	50.0%	6	3	50.0%	10	5	50.0%
Total	25	4	2	50.0%	6	3	50.0%	10	5	50.0%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Nebraska, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	24	10	4	40.0%	10	1	10.0%	21	6	28.6%
2012	25	6	2	33.3%	10	2	20.0%	16	4	25.0%
2014	24	2	0	0.0%	5	1	20.0%	7	1	14.3%
2016	25	4	2	50.0%	9	1	11.1%	14	4	28.6%
2018	24	3	0	0.0%	12	4	33.3%	16	5	31.3%
2020	25	7	0	0.0%	12	2	16.7%	19	2	10.5%
2022	24	3	2	66.7%	8	4	50.0%	11	6	54.5%
2024	25	4	2	50.0%	6	3	50.0%	10	5	50.0%

See also:

• Nebraska State Senate elections, 2024

Nevada

There were 52 seats up for election in Nevada. A total of 37 incumbents filed for re-election: 23 Democrats and 14 Republicans. Of that total, eight incumbents—five Democrats and three Republicans—faced contested primaries, representing 21.6% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Nevada, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	42	18	3	16.7%	13	2	15.4%	31	5	16.1%
Senate	10	5	2	40.0%	1	1	100.0%	6	3	50.0%
Total	52	23	5	21.7%	14	3	21.4%	37	8	21.6%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Nevada, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	53	17	1	5.9%	9	4	44.4%	26	5	19.2%
2012	52	24	10	41.7%	12	2	16.7%	36	12	33.3%
2014	53	26	5	19.2%	17	8	47.1%	43	13	30.2%
2016	52	21	6	28.6%	19	11	57.9%	41	17	41.5%
2018	53	24	3	12.5%	14	5	35.7%	38	8	21.1%
2020	52	25	3	12.0%	14	4	28.6%	39	7	17.9%
2022	53	25	9	36.0%	9	4	44.4%	34	13	38.2%
2024	52	23	5	21.7%	14	3	21.4%	37	8	21.6%

See also:

• Nevada State Assembly elections, 2024
• Nevada State Senate elections, 2024

New Hampshire

There were 424 seats up for election in New Hampshire. A total of 329 incumbents filed for re-election: 158 Democrats and 171 Republicans. Of that total, 86 incumbents—23 Democrats and 63 Republicans—faced contested primaries, representing 26.1% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in New Hampshire, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	400	150	23	15.3%	159	62	39.0%	309	85	27.5%
Senate	24	8	0	0.0%	12	1	8.3%	20	1	5.0%
Total	424	158	23	14.6%	171	63	36.8%	329	86	26.1%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in New Hampshire, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	424	178	45	25.3%	144	79	54.9%	322	124	38.5%
2012	424	85	14	16.5%	230	131	57.0%	315	145	46.0%
2014	424	170	24	14.1%	143	80	55.9%	313	104	33.2%
2016	424	128	25	19.5%	179	100	55.9%	307	125	40.7%
2018	424	147	30	20.4%	170	57	33.5%	320	87	27.2%
2020	424	209	44	21.1%	135	56	41.5%	344	100	29.1%
2022	424	133	26	19.5%	169	90	53.3%	302	116	38.4%
2024	424	158	23	14.6%	171	63	36.8%	329	86	26.1%

See also:

• New Hampshire House of Representatives elections, 2024
• New Hampshire State Senate elections, 2024

New Mexico

There were 112 seats up for election in New Mexico. A total of 93 incumbents filed for re-election: 65 Democrats and 28 Republicans. Of that total, 22 incumbents—17 Democrats and five Republicans—faced contested primaries, representing 23.7% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in New Mexico, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	70	42	10	23.8%	20	3	15.0%	62	13	21.0%
Senate	42	23	7	30.4%	8	2	25.0%	31	9	29.0%
Total	112	65	17	26.2%	28	5	17.9%	93	22	23.7%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in New Mexico, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	70	44	10	22.7%	23	4	17.4%	67	14	20.9%
2012	112	50	19	38.0%	40	5	12.5%	91	24	26.4%
2014	70	31	5	16.1%	28	2	7.1%	59	7	11.9%
2016	112	52	9	17.3%	50	0	0.0%	102	9	8.8%
2018	70	35	5	14.3%	26	1	3.8%	61	6	9.8%
2020	112	65	17	26.2%	36	3	8.3%	101	20	19.8%
2022	70	39	8	20.5%	19	4	21.1%	58	12	20.7%
2024	112	65	17	26.2%	28	5	17.9%	93	22	23.7%

See also:

• New Mexico House of Representatives elections, 2024
• New Mexico State Senate elections, 2024

New York

There were 213 seats up for election in New York. A total of 195 incumbents filed for re-election: 129 Democrats and 66 Republicans. Of that total, 18 incumbents—17 Democrats and one Republican—faced contested primaries, representing 9.2% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in New York, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	150	92	16	17.4%	45	1	2.2%	137	17	12.4%
Senate	63	37	1	2.7%	21	0	0.0%	58	1	1.7%
Total	213	129	17	13.2%	66	1	1.5%	195	18	9.2%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in New York, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	212	128	35	27.3%	59	2	3.4%	187	37	19.8%
2012	213	118	24	20.3%	71	9	12.7%	189	33	17.5%
2014	213	126	22	17.5%	66	5	7.6%	192	27	14.1%
2016	213	129	28	21.7%	65	5	7.7%	194	33	17.0%
2018	213	131	27	20.6%	64	4	6.3%	195	31	15.9%
2020	213	132	34	25.8%	46	1	2.2%	180	35	19.4%
2022	213	139	42	30.2%	52	4	7.7%	191	46	24.1%
2024	213	129	17	13.2%	66	1	1.5%	195	18	9.2%

See also:

• New York State Assembly elections, 2024
• New York State Senate elections, 2024

North Carolina

There were 170 seats up for election in North Carolina. A total of 149 incumbents filed for re-election: 58 Democrats and 91 Republicans. Of that total, 19 incumbents—eight Democrats and 11 Republicans—faced contested primaries, representing 12.8% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in North Carolina, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	120	41	5	12.2%	64	11	17.2%	105	16	15.2%
Senate	50	17	3	17.6%	27	0	0.0%	44	3	6.8%
Total	170	58	8	13.8%	91	11	12.1%	149	19	12.8%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in North Carolina, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	170	88	24	27.3%	64	15	23.4%	152	39	25.7%
2012	170	50	15	30.0%	77	22	28.6%	127	37	29.1%
2014	170	54	9	16.7%	102	20	19.6%	156	29	18.6%
2016	170	57	13	22.8%	93	18	19.4%	150	31	20.7%
2018	170	57	11	19.3%	96	28	29.2%	153	39	25.5%
2020	170	69	12	17.4%	75	12	16.0%	144	24	16.7%
2022	170	56	9	16.1%	88	24	27.3%	144	33	22.9%
2024	170	58	8	13.8%	91	11	12.1%	149	19	12.8%

See also:

• North Carolina House of Representatives elections, 2024
• North Carolina State Senate elections, 2024

North Dakota

There were 69 seats up for election in North Dakota. A total of 52 incumbents filed for re-election: four Democrats and 48 Republicans. Of that total, 20 Republican incumbents faced contested primaries, representing 38.5% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in North Dakota, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	46	3	0	0.0%	34	17	50.0%	37	17	45.9%
Senate	23	1	0	0.0%	14	3	21.4%	15	3	20.0%
Total	69	4	0	0.0%	48	20	41.7%	52	20	38.5%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in North Dakota, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	72	24	2	8.3%	33	0	0.0%	57	2	3.5%
2012	75	18	0	0.0%	43	10	23.3%	61	10	16.4%
2014	72	10	0	0.0%	49	4	8.2%	59	4	6.8%
2016	69	21	0	0.0%	33	7	21.2%	54	7	13.0%
2018	72	11	0	0.0%	49	6	12.2%	60	6	10.0%
2020	69	7	0	0.0%	56	5	8.9%	63	5	7.9%
2022	98	17	2	11.8%	58	25	43.1%	75	27	36.0%
2024	69	4	0	0.0%	48	20	41.7%	52	20	38.5%

See also:

• North Dakota House of Representatives elections, 2024
• North Dakota State Senate elections, 2024

Ohio

There were 115 seats up for election in Ohio. A total of 87 incumbents filed for re-election: 25 Democrats and 62 Republicans. Of that total, 24 incumbents—four Democrats and 20 Republicans—faced contested primaries, representing 27.6% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Ohio, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	99	25	4	16.0%	52	18	34.6%	77	22	28.6%
Senate	16	0	0	0.0%	10	2	20.0%	10	2	20.0%
Total	115	25	4	16.0%	62	20	32.3%	87	24	27.6%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Ohio, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	116	47	6	12.8%	40	8	20.0%	87	14	16.1%
2012	117	36	6	16.7%	62	8	12.9%	98	14	14.3%
2014	116	31	4	12.9%	59	19	32.2%	90	23	25.6%
2016	115	28	4	14.3%	58	10	17.2%	86	14	16.3%
2018	116	25	6	24.0%	49	14	28.6%	74	20	27.0%
2020	115	35	7	20.0%	57	7	12.3%	92	14	15.2%
2022	116	24	6	25.0%	62	14	22.6%	86	20	23.3%
2024	115	25	4	16.0%	62	20	32.3%	87	24	27.6%

See also:

• Ohio House of Representatives elections, 2024
• Ohio State Senate elections, 2024

Oklahoma

There were 125 seats up for election in Oklahoma. A total of 103 incumbents filed for re-election: 18 Democrats and 85 Republicans. Of that total, 29 incumbents—one Democrat and 28 Republicans—faced contested primaries, representing 28.2% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Oklahoma, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	101	17	1	5.9%	70	20	28.6%	87	21	24.1%
Senate	24	1	0	0.0%	15	8	53.3%	16	8	50.0%
Total	125	18	1	5.6%	85	28	32.9%	103	29	28.2%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Oklahoma, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	125	41	5	12.2%	62	7	11.3%	103	12	11.7%
2012	125	30	2	6.7%	72	17	23.6%	102	19	18.6%
2014	125	25	1	4.0%	70	12	17.1%	95	13	13.7%
2016	125	20	4	20.0%	64	24	37.5%	84	28	33.3%
2018	125	22	2	9.1%	60	35	58.3%	82	37	45.1%
2020	125	23	3	13.0%	91	30	33.0%	114	33	28.9%
2022	125	21	2	9.5%	84	24	28.6%	105	26	24.8%
2024	125	18	1	5.6%	85	28	32.9%	103	29	28.2%

See also:

• Oklahoma House of Representatives elections, 2024
• Oklahoma State Senate elections, 2024

Oregon

There were 75 seats up for election in Oregon. A total of 61 incumbents filed for re-election: 35 Democrats and 26 Republicans. Of that total, 11 incumbents—five Democrats and six Republicans—faced contested primaries, representing 18.0% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Oregon, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	60	30	5	16.7%	23	5	21.7%	53	10	18.9%
Senate	15	5	0	0.0%	3	1	33.3%	8	1	12.5%
Total	75	35	5	14.3%	26	6	23.1%	61	11	18.0%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Oregon, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	76	44	2	4.5%	25	7	28.0%	69	9	13.0%
2012	76	31	1	3.2%	35	3	8.6%	66	4	6.1%
2014	75	38	3	7.9%	22	3	13.6%	60	6	10.0%
2016	75	30	2	6.7%	28	2	7.1%	58	4	6.9%
2018	73	42	4	9.5%	23	5	21.7%	65	9	13.8%
2020	75	34	4	11.8%	26	1	3.8%	60	5	8.3%
2022	75	34	4	11.8%	17	5	29.4%	51	9	17.6%
2024	75	35	5	14.3%	26	6	23.1%	61	11	18.0%

See also:

• Oregon House of Representatives elections, 2024
• Oregon State Senate elections, 2024

Pennsylvania

There were 228 seats up for election in Pennsylvania. A total of 212 incumbents filed for re-election: 107 Democrats and 105 Republicans. Of that total, 21 incumbents—nine Democrats and 12 Republicans—faced contested primaries, representing 9.9% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Pennsylvania, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	203	98	9	9.2%	92	12	13.0%	190	21	11.1%
Senate	25	9	0	0.0%	13	0	0.0%	22	0	0.0%
Total	228	107	9	8.4%	105	12	11.4%	212	21	9.9%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Pennsylvania, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	228	100	20	20.0%	107	9	8.4%	207	29	14.0%
2012	228	88	17	19.3%	115	15	13.0%	203	32	15.8%
2014	228	95	30	31.6%	108	12	11.1%	203	42	20.7%
2016	228	89	19	21.3%	120	9	7.5%	209	28	13.4%
2018	228	82	14	17.1%	114	8	7.0%	196	22	11.2%
2020	228	96	18	18.8%	113	10	8.8%	209	28	13.4%
2022	228	92	20	21.7%	98	22	22.4%	190	42	22.1%
2024	228	107	9	8.4%	105	12	11.4%	212	21	9.9%

See also:

• Pennsylvania House of Representatives elections, 2024
• Pennsylvania State Senate elections, 2024

Rhode Island

There were 113 seats up for election in Rhode Island. A total of 104 incumbents filed for re-election: 92 Democrats, 11 Republicans, and one minor party or independent incumbent. Of that total, 12 Democratic incumbents faced contested primaries, representing 11.5% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Rhode Island, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	75	63	9	14.3%	6	0	0.0%	70	9	12.9%
Senate	38	29	3	10.3%	5	0	0.0%	34	3	8.8%
Total	113	92	12	13.0%	11	0	0.0%	104	12	11.5%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Rhode Island, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	113	88	32	36.4%	9	2	22.2%	98	34	34.7%
2012	113	84	24	28.6%	15	2	13.3%	100	26	26.0%
2014	113	95	18	18.9%	9	0	0.0%	105	18	17.1%
2016	113	91	18	19.8%	13	0	0.0%	105	18	17.1%
2018	113	86	20	23.3%	12	0	0.0%	98	20	20.4%
2020	113	90	26	28.9%	13	0	0.0%	104	26	25.0%
2022	113	86	29	33.7%	13	1	7.7%	99	30	30.3%
2024	113	92	12	13.0%	11	0	0.0%	104	12	11.5%

See also:

• Rhode Island House of Representatives elections, 2024
• Rhode Island State Senate elections, 2024

South Carolina

There were 170 seats up for election in South Carolina. A total of 150 incumbents filed for re-election: 46 Democrats and 104 Republicans. Of that total, 51 incumbents—16 Democrats and 35 Republicans—faced contested primaries, representing 34.0% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in South Carolina, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	124	33	9	27.3%	76	29	38.2%	109	38	34.9%
Senate	46	13	7	53.8%	28	6	21.4%	41	13	31.7%
Total	170	46	16	34.8%	104	35	33.7%	150	51	34.0%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in South Carolina, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	124	48	11	22.9%	64	15	23.4%	112	26	23.2%
2012	170	57	7	12.3%	91	16	17.6%	148	23	15.5%
2014	124	42	5	11.9%	73	15	20.5%	115	20	17.4%
2016	170	57	14	24.6%	96	28	29.2%	153	42	27.5%
2018	124	42	11	26.2%	74	25	33.8%	116	36	31.0%
2020	170	59	14	23.7%	97	22	22.7%	156	36	23.1%
2022	124	41	11	26.8%	70	23	32.9%	111	34	30.6%
2024	170	46	16	34.8%	104	35	33.7%	150	51	34.0%

See also:

• South Carolina House of Representatives elections, 2024
• South Carolina State Senate elections, 2024

South Dakota

There were 105 seats up for election in South Dakota. A total of 69 incumbents filed for re-election: eight Democrats and 61 Republicans. Of that total, 42 incumbents—one Democrat and 41 Republicans—faced contested primaries, representing 60.9% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in South Dakota, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	70	5	0	0.0%	43	32	74.4%	48	32	66.7%
Senate	35	3	1	33.3%	18	9	50.0%	21	10	47.6%
Total	105	8	1	12.5%	61	41	67.2%	69	42	60.9%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in South Dakota, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	105	26	3	11.5%	45	4	8.9%	71	7	9.9%
2012	105	15	3	20.0%	59	22	37.3%	74	25	33.8%
2014	105	16	2	12.5%	58	15	25.9%	74	17	23.0%
2016	105	10	0	0.0%	53	18	34.0%	63	18	28.6%
2018	105	9	3	33.3%	70	17	24.3%	79	20	25.3%
2020	105	14	2	14.3%	62	23	37.1%	76	25	32.9%
2022	105	8	0	0.0%	63	35	55.6%	71	35	49.3%
2024	105	8	1	12.5%	61	41	67.2%	69	42	60.9%

See also:

• South Dakota House of Representatives elections, 2024
• South Dakota State Senate elections, 2024

Tennessee

There were 115 seats up for election in Tennessee. A total of 107 incumbents filed for re-election: 24 Democrats and 83 Republicans. Of that total, 28 incumbents—eight Democrats and 20 Republicans—faced contested primaries, representing 26.2% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Tennessee, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	99	22	7	31.8%	70	13	18.6%	92	20	21.7%
Senate	16	2	1	50.0%	13	7	53.8%	15	8	53.3%
Total	115	24	8	33.3%	83	20	24.1%	107	28	26.2%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Tennessee, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	116	54	6	11.1%	51	6	11.8%	106	12	11.3%
2012	115	30	11	36.7%	67	24	35.8%	98	35	35.7%
2014	116	29	5	17.2%	75	20	26.7%	104	25	24.0%
2016	115	26	8	30.8%	83	26	31.3%	109	34	31.2%
2018	116	20	7	35.0%	69	17	24.6%	89	24	27.0%
2020	115	26	10	38.5%	82	17	20.7%	109	27	24.8%
2022	116	24	5	20.8%	74	10	13.5%	99	15	15.2%
2024	115	24	8	33.3%	83	20	24.1%	107	28	26.2%

See also:

• Tennessee House of Representatives elections, 2024
• Tennessee State Senate elections, 2024

Texas

There were 165 seats up for election in Texas. A total of 148 incumbents filed for re-election: 65 Democrats and 83 Republicans. Of that total, 60 incumbents—14 Democrats and 46 Republicans—faced contested primaries, representing 40.5% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Texas, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	150	57	12	21.1%	77	46	59.7%	134	58	43.3%
Senate	15	8	2	25.0%	6	0	0.0%	14	2	14.3%
Total	165	65	14	21.5%	83	46	55.4%	148	60	40.5%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Texas, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	166	75	8	10.7%	82	20	24.4%	157	28	17.8%
2012	181	53	8	15.1%	94	43	45.7%	147	51	34.7%
2014	165	57	11	19.3%	93	28	30.1%	150	39	26.0%
2016	166	54	13	24.1%	95	33	34.7%	150	46	30.7%
2018	165	57	17	29.8%	94	33	35.1%	151	50	33.1%
2020	166	70	21	30.0%	85	11	12.9%	155	32	20.6%
2022	181	68	13	19.1%	84	32	38.1%	152	45	29.6%
2024	165	65	14	21.5%	83	46	55.4%	148	60	40.5%

See also:

• Texas House of Representatives elections, 2024
• Texas State Senate elections, 2024

Utah

There were 89 seats up for election in Utah. A total of 74 incumbents filed for re-election: 14 Democrats and 60 Republicans. Of that total, 12 incumbents—one Democrat and 11 Republicans—faced contested primaries, representing 16.2% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Utah, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	75	12	1	8.3%	50	7	14.0%	62	8	12.9%
Senate	14	2	0	0.0%	10	4	40.0%	12	4	33.3%
Total	89	14	1	7.1%	60	11	18.3%	74	12	16.2%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Utah, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	90	27	1	3.7%	54	8	14.8%	81	9	11.1%
2012	91	17	2	11.8%	61	12	19.7%	78	14	17.9%
2014	89	13	0	0.0%	64	4	6.3%	77	4	5.2%
2016	90	13	0	0.0%	63	6	9.5%	76	6	7.9%
2018	89	14	0	0.0%	51	3	5.9%	65	3	4.6%
2020	90	15	0	0.0%	62	12	19.4%	77	12	15.6%
2022	90	18	2	11.1%	64	13	20.3%	82	15	18.3%
2024	89	14	1	7.1%	60	11	18.3%	74	12	16.2%

See also:

• Utah House of Representatives elections, 2024
• Utah State Senate elections, 2024

Vermont

There were 180 seats up for election in Vermont. A total of 140 incumbents filed for re-election: 103 Democrats, 34 Republicans, and three minor party or independent incumbents. Of that total, 20 incumbents—19 Democrats and one Republican—faced contested primaries, representing 14.3% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Vermont, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	150	84	8	9.5%	27	1	3.7%	114	9	7.9%
Senate	30	19	11	57.9%	7	0	0.0%	26	11	42.3%
Total	180	103	19	18.4%	34	1	2.9%	140	20	14.3%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Vermont, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	180	107	8	7.5%	47	5	10.6%	159	13	8.2%
2012	180	105	11	10.5%	45	1	2.2%	155	12	7.7%
2014	180	105	5	4.8%	45	3	6.7%	153	8	5.2%
2016	180	88	23	26.1%	58	4	6.9%	152	27	17.8%
2018	180	88	15	17.0%	44	4	9.1%	148	19	12.8%
2020	180	106	22	20.8%	44	4	9.1%	158	26	16.5%
2022	180	87	14	16.1%	36	4	11.1%	125	18	14.4%
2024	180	103	19	18.4%	34	1	2.9%	140	20	14.3%

See also:

• Vermont House of Representatives elections, 2024
• Vermont State Senate elections, 2024

Washington

There were 123 seats up for election in Washington. A total of 97 incumbents filed for re-election: 61 Democrats and 36 Republicans. Of that total, 24 incumbents—15 Democrats and nine Republicans—faced contested primaries, representing 24.7% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Washington, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	98	53	14	26.4%	27	6	22.2%	80	20	25.0%
Senate	25	8	1	12.5%	9	3	33.3%	17	4	23.5%
Total	123	61	15	24.6%	36	9	25.0%	97	24	24.7%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Washington, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	123	65	21	32.3%	38	3	7.9%	103	24	23.3%
2012	124	53	10	18.9%	45	5	11.1%	98	15	15.3%
2014	123	63	15	23.8%	48	8	16.7%	111	23	20.7%
2016	124	52	16	30.8%	51	16	31.4%	103	32	31.1%
2018	123	59	16	27.1%	47	18	38.3%	106	34	32.1%
2020	123	62	25	40.3%	45	13	28.9%	107	38	35.5%
2022	122	59	22	37.3%	37	9	24.3%	96	31	32.3%
2024	123	61	15	24.6%	36	9	25.0%	97	24	24.7%

See also:

• Washington House of Representatives elections, 2024
• Washington State Senate elections, 2024

West Virginia

There were 117 seats up for election in West Virginia. A total of 98 incumbents filed for re-election: eight Democrats and 90 Republicans. Of that total, 30 Republican incumbents faced contested primaries, representing 30.6% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in West Virginia, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	100	8	0	0.0%	76	23	30.3%	84	23	27.4%
Senate	17	0	0	#DIV/0!	14	7	50.0%	14	7	50.0%
Total	117	8	0	0.0%	90	30	33.3%	98	30	30.6%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in West Virginia, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	117	76	46	60.5%	27	6	22.2%	103	52	50.5%
2012	117	66	37	56.1%	32	8	25.0%	98	45	45.9%
2014	117	60	19	31.7%	46	15	32.6%	106	34	32.1%
2016	117	35	20	57.1%	58	18	31.0%	93	38	40.9%
2018	117	38	15	39.5%	60	25	41.7%	99	40	40.4%
2020	117	33	14	42.4%	60	31	51.7%	93	45	48.4%
2022	117	22	5	22.7%	76	31	40.8%	98	36	36.7%
2024	117	8	0	0.0%	90	30	33.3%	98	30	30.6%

See also:

• West Virginia House of Delegates elections, 2024
• West Virginia State Senate elections, 2024

Wisconsin

There were 115 seats up for election in Wisconsin. A total of 89 incumbents filed for re-election: 27 Democrats and 62 Republicans. Of that total, 28 incumbents—five Democrats and 23 Republicans—faced contested primaries, representing 31.5% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Wisconsin, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	99	22	4	18.2%	54	22	40.7%	76	26	34.2%
Senate	16	5	1	20.0%	8	1	12.5%	13	2	15.4%
Total	115	27	5	18.5%	62	23	37.1%	89	28	31.5%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Wisconsin, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	116	52	6	11.5%	40	7	17.5%	93	13	14.0%
2012	115	36	9	25.0%	58	6	10.3%	94	15	16.0%
2014	116	36	2	5.6%	51	1	2.0%	87	3	3.4%
2016	115	39	8	20.5%	63	0	0.0%	102	8	7.8%
2018	116	37	3	8.1%	63	1	1.6%	100	4	4.0%
2020	115	33	5	15.2%	62	4	6.5%	95	9	9.5%
2022	116	31	0	0.0%	55	9	16.4%	86	9	10.5%
2024	115	27	5	18.5%	62	23	37.1%	89	28	31.5%

See also:

• Wisconsin State Assembly elections, 2024
• Wisconsin State Senate elections, 2024

Wyoming

There were 77 seats up for election in Wyoming. A total of 61 incumbents filed for re-election: five Democrats and 56 Republicans. Of that total, 40 Republican incumbents faced contested primaries, representing 65.6% of incumbents who filed for re-election.

In 2024

Statistics from 2024 are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Wyoming, 2024
Chamber	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
House	62	5	0	0.0%	46	33	71.7%	51	33	64.7%
Senate	15	0	0	0.0%	10	7	70.0%	10	7	70.0%
Total	77	5	0	0.0%	56	40	71.4%	61	40	65.6%

2010-2024

Historical statistics are shown below. Hover over column headings to learn more about their contents.

State legislative incumbents in contested primaries in Wyoming, 2010-2024
Year	Seats
		Democratic			Republican			Total
		Filed	Cont.	%	Filed	Cont.	%	Filed	Cont.	%
2010	75	18	0	0.0%	42	15	35.7%	60	15	25.0%
2012	75	9	0	0.0%	51	21	41.2%	60	21	35.0%
2014	75	9	0	0.0%	55	26	47.3%	64	26	40.6%
2016	75	9	0	0.0%	46	20	43.5%	55	20	36.4%
2018	75	9	0	0.0%	56	19	33.9%	65	19	29.2%
2020	75	7	1	14.3%	52	30	57.7%	60	31	51.7%
2022	78	7	0	0.0%	49	28	57.1%	57	28	49.1%
2024	77	5	0	0.0%	56	40	71.4%	61	40	65.6%

See also:

• Wyoming House of Representatives elections, 2024
• Wyoming State Senate elections, 2024

Incumbents defeated in state legislative primaries

See also: Incumbents defeated in state legislative elections, 2024

The chart below shows a partisan breakdown of incumbents defeated in primaries from 2010 to 2024.

Terms and definitions

Incumbent

See also: Incumbent

Ballotpedia defines incumbency by chamber. Under this definition, if an incumbent in House District 1 filed for re-election in House District 2, they would still be counted as an incumbent due to their remaining in the same chamber even though they ran for a different seat. If an incumbent in House District 1 filed to run in Senate District 2, they would not be counted as an incumbent in the Senate race since they are coming from a different chamber.

Ballotpedia uses the term re-elect to refer to any incumbent who is running in an election to retain their office, including incumbents who were originally appointed to their position.

Contested primary

See also: Primary election

A contested primary is one where there are more candidates running than nominations available, meaning at least one candidate on the primary ballot must lose.

The number of candidates needed to create a contested primary depends on the primary system in place and the number of seats up for election in a state legislative district.

In states with partisan primaries, a primary is typically contested when two or more candidates from the same political party file to run since only one candidate can receive their party's nomination. In states with multi-member state legislative districts, the number of candidates a party can nominate to the general election ballot depends on the number of seats in the district. In these cases, a primary is contested when at least one more candidate files to run than there are seats in the district. In states with top-two/four primaries, a primary is contested when more than two (in states with a top-two system) or more than four (in states with a top-four system) candidates file to run.

Methodology

Counting incumbents in contested primaries

An incumbent is counted as facing a contested primary when there is a chance that incumbent could lose to a primary challenger. Each incumbent is counted individually.

Typically, in a single-member district, this means the incumbent filed for re-election and faced one or more primary challengers.

But in states with multi-member districts, several incumbents might be seeking re-election. If such a primary becomes contested, every incumbent running for re-election is counted as facing a contested primary even if it is not possible for every incumbent to lose.

For example, in a district with two seats where two Democratic incumbents file for re-election, if a third Democrat joins the primary, both of the Democratic incumbents are counted as facing a contested primary even though the third primary challenger can only potentially defeat one.

In the event of an incumbent v. incumbent primary, where there are more incumbents running in the primary than nominations available, every incumbent present is counted as facing a contested primary.

Candidacy withdrawals

See also: Signature requirements and deadlines for 2024 state government elections

In order to have their names printed on election ballots, candidates must submit information prior to a filing deadline. Filing deadlines are the dates by which candidates must submit required paperwork to state election administrators.

For major party candidates, filing deadlines always precede primaries. However, candidates may choose to withdraw before the primary takes place. Withdrawals include decisions to leave the race, disqualifications, and deaths. These withdrawals are either official or unofficial.

An official withdrawal means the candidate withdrew before a specific date set in state law and their name was removed from the primary ballot. If an incumbent officially withdrew before the primary, they are not included in any of the totals of this analysis, unless they later re-entered the race as a minor party or independent candidate.

An unofficial withdrawal means the candidate withdrew after a specific date set in state law, typically after ballots have been printed, meaning their name remains on the ballot even though they are not actively campaigning. If an incumbent unofficially withdrew, they are included in the totals of this analysis.

Minor party and independent incumbents

Minor party and independent incumbents typically do not participate in primaries in the same way major party incumbents might.

For minor party incumbents, nominations are normally carried out via conventions, which are limited to a smaller number of voting delegates. Ballotpedia does not count conventions as primaries.

Independent incumbents normally do not participate in primaries, qualifying instead for the general election ballot directly.

If a minor party or independent incumbent participates in a contested primary (partisan or top-two/four), they are included in the total number of incumbents in contested primaries.

All minor party or independent incumbents who have filed for re-election are included in the total number of incumbents running at the time of the primary even if the filing deadline was later than the primary date.

Convention defeats

If an incumbent is defeated in a convention and did not appear in any later elections, that incumbent is still included in the total number of incumbents who filed for re-election even though they were not running at the time of the primary.

See also

• Election results, 2024: State legislatures
• State legislative elections, 2024
  • Impact of term limits on state legislative elections in 2024
  • Open seats in state legislative elections, 2024
  • Contested state legislative primaries, 2024
  • Major party competition in state legislative elections, 2024
  • State legislative incumbents without general election challengers, 2024
  • Incumbents defeated in state legislative elections, 2024
• Primary election competitiveness in state and federal government, 2024

Footnotes

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