Partisan registration by district in California, 2010

Redistricting
State-by-state redistricting procedures
Majority-minority districts
Congressional district demographics
United States census, 2020

This page details registration by figures in California in October 2010.

Partisan registration and representation by congressional district, 2010
Congressional district		Democrats	Republicans	Unaffiliated	District total	Party advantage*	111th Congress	112th Congress
1		171,461	96,512	102,984	370,957	77.66% Democratic
2		115,429	153,383	86,766	355,578	32.88% Republican
3		151,132	165,049	89,469	405,650	9.21% Republican
4		134,504	204,022	107,688	446,214	51.68% Republican
5		161,480	81,290	71,530	314,300	98.65% Democratic
6		193,084	75,269	92,590	360,943	156.53% Democratic
7		168,742	61,983	72,972	303,697	172.24% Democratic
8		215,876	33,826	130,092	379,794	538.20% Democratic
9		231,184	33,731	94,663	359,578	585.38% Democratic
10		175,773	106,988	90,992	373,753	64.29% Democratic
11		147,756	148,941	82,230	378,927	0.80% Republican
12		173,524	60,092	97,086	330,702	188.76% Democratic
13		160,926	51,220	87,394	299,540	214.19% Democratic
14		156,106	76,200	95,506	327,812	104.86% Democratic
15		133,072	72,358	94,735	300,165	83.91% Democratic
16		130,779	62,525	78,523	271,827	109.16% Democratic
17		157,480	64,212	67,202	288,894	145.25% Democratic
18		132,424	85,026	49,115	266,565	55.75% Democratic
19		131,323	151,651	71,389	354,363	15.48% Republican
20		107,792	65,430	37,197	210,419	64.74% Democratic
21		106,332	143,447	59,407	309,186	34.90% Republican
22		111,796	175,442	79,404	366,642	56.93% Republican
23		148,511	87,461	82,488	318,460	69.80% Democratic
24		135,779	159,433	88,082	383,294	17.42% Republican
25		132,929	142,211	85,193	360,333	6.98% Republican
26		130,100	148,938	91,143	370,181	14.48% Republican
27		152,498	79,510	81,391	313,399	91.80% Democratic
28		145,835	44,485	68,641	258,961	227.83% Democratic
29		141,524	81,565	88,841	311,930	73.51% Democratic
30		211,558	95,501	111,286	418,345	121.52% Democratic
31		119,862	27,556	55,031	202,449	334.98% Democratic
32		129,337	57,665	65,637	252,639	124.29% Democratic
33		204,257	32,542	75,060	311,859	527.67% Democratic
34		124,712	38,026	50,527	213,265	227.97% Democratic
35		180,432	34,768	56,567	271,767	418.96% Democratic
36		157,418	95,758	94,106	347,282	64.39% Democratic
37		173,116	47,769	66,258	287,143	262.40% Democratic
38		147,563	55,806	60,614	263,983	164.42% Democratic
39		141,820	69,664	62,089	273,573	103.58% Democratic
40		115,657	147,237	83,534	346,428	27.30% Republican
41		117,761	157,966	80,024	355,751	34.14% Republican
42		112,360	171,292	90,202	373,854	52.45% Republican
43		117,939	71,225	51,173	240,337	65.59% Democratic
44		119,794	155,203	82,949	357,946	29.56% Republican
45		138,429	150,257	74,301	362,987	8.54% Republican
46		128,505	176,279	103,213	407,997	37.18% Republican
47		105,007	69,251	50,183	224,441	51.63% Democratic
48		127,783	195,095	119,027	441,905	52.68% Republican
49		95,961	144,763	81,268	321,992	50.86% Republican
50		118,408	159,060	110,026	387,494	34.33% Republican
51		137,505	73,623	72,697	283,825	86.77% Democratic
52		107,010	148,120	91,021	346,151	38.42% Republican
53		132,895	75,249	92,262	300,406	76.61% Democratic
State totals		7,620,240	5,361,875	4,303,768	17,285,883	42.12% Democratic	34 D, 19 R	34 D, 19 R
*The partisan registration advantage was computed as the gap between the two major parties in registered voters.

See also

• Redistricting in California
• Redistricting
• State-by-state redistricting procedures