California's 40th Congressional District

The boundaries of this district will change as a result of California Proposition 50, which voters approved on November 5, 2025. Click here to read more about the mid-decade redistricting effort in California and other states.

California's 40th Congressional District

Incumbent

Young Kim

Assumed office: January 3, 2023

California's 40th Congressional District in the United States House of Representatives is represented by Young Kim (R).

As of the 2020 Census, California representatives represented an average of 761,091 residents. After the 2010 Census, each member represented 704,566 residents.

Elections

• 2030
• 2028
• 2026
• 2024
• 2022
• 2020
• 2018

See also: California's 40th Congressional District election, 2030

There are no official candidates yet for this election.

See also: California's 40th Congressional District election, 2028

There are no official candidates yet for this election.

See also: California's 40th Congressional District election, 2026

Note: At this time, Ballotpedia is combining all declared candidates for this election into one list under a general election heading. As primary election dates are published, this information will be updated to separate general election candidates from primary candidates as appropriate.

General election

The general election will occur on November 3, 2026.

General election for U.S. House California District 40

The following candidates are running in the general election for U.S. House California District 40 on November 3, 2026.

		Candidate
		Ken Calvert (R)
		Young Kim (R)
		Claude Keissieh (D)
		Joe Kerr (D)
		Perry Meade (D)
	Submit photo	Eric Peterson (D)
		Lisa Ramirez (D)
		Paula Swift (D)
		Tiffanie Tate (D)
		Esther Kim Varet (D)
	Submit photo	Maricar Payad (American Independent Party)
	Submit photo	Christian Ahmed (No party preference)
		Nina Linh (Independent)

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	Incumbents are bolded and underlined.
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Christina Gagnier (D)

See also: California's 40th Congressional District election, 2024

General election

General election for U.S. House California District 40

Incumbent Young Kim (R) defeated Joe Kerr (D) in the general election for U.S. House California District 40 on November 5, 2024.

		Candidate	%	Votes
✔		Young Kim (R)	55.3	211,998
		Joe Kerr (D)	44.7	171,637

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 383,635
= candidate completed the Ballotpedia Candidate Connection survey.
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Nonpartisan primary

Nonpartisan primary election for U.S. House California District 40

Incumbent Young Kim (R) and Joe Kerr (D) defeated Allyson Damikolas (D) in the primary for U.S. House California District 40 on March 5, 2024.

		Candidate	%	Votes
✔		Young Kim (R)	56.4	109,963
✔		Joe Kerr (D)	25.6	49,965
		Allyson Damikolas (D)	18.0	35,153

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 195,081
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
Do you want a spreadsheet of this type of data? Contact our sales team.

See also: California's 40th Congressional District election, 2022

General election

General election for U.S. House California District 40

Incumbent Young Kim (R) defeated Asif Mahmood (D) in the general election for U.S. House California District 40 on November 8, 2022.

		Candidate	%	Votes
✔		Young Kim (R)	56.8	161,589
		Asif Mahmood (D)	43.2	122,722

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 284,311
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
Do you want a spreadsheet of this type of data? Contact our sales team.

Nonpartisan primary

Nonpartisan primary election for U.S. House California District 40

Asif Mahmood (D) and incumbent Young Kim (R) defeated Greg Raths (R) and Nicholas Taurus (R) in the primary for U.S. House California District 40 on June 7, 2022.

		Candidate	%	Votes
✔		Asif Mahmood (D)	40.9	74,607
✔		Young Kim (R)	34.7	63,346
		Greg Raths (R)	23.2	42,404
		Nicholas Taurus (R)	1.2	2,193

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 182,550
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
Do you want a spreadsheet of this type of data? Contact our sales team.

Withdrawn or disqualified candidates

• Hilaire Shioura (R)

See also: California's 40th Congressional District election, 2020

General election

General election for U.S. House California District 40

Incumbent Lucille Roybal-Allard (D) defeated C. Antonio Delgado (R) in the general election for U.S. House California District 40 on November 3, 2020.

		Candidate	%	Votes
✔		Lucille Roybal-Allard (D)	72.7	135,572
		C. Antonio Delgado (R)	27.3	50,809

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 186,381
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
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Nonpartisan primary

Nonpartisan primary election for U.S. House California District 40

The following candidates ran in the primary for U.S. House California District 40 on March 3, 2020.

		Candidate	%	Votes
✔		Lucille Roybal-Allard (D)	50.7	38,837
✔		C. Antonio Delgado (R)	13.7	10,467
		David Sanchez (D)	13.4	10,256
		Anthony Felix Jr. (D)	12.4	9,473
		Rodolfo Cortes Barragan (G)	7.3	5,578
	Submit photo	Michael Graham Jr. (American Independent Party of California)	2.6	1,967

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 76,578
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
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Withdrawn or disqualified candidates

• Orion Paige Metzger (D)
• Juan Luis Rivera (L)

See also: United States House of Representatives elections in California, 2018

General election

General election for U.S. House California District 40

Incumbent Lucille Roybal-Allard (D) defeated Rodolfo Cortes Barragan (G) in the general election for U.S. House California District 40 on November 6, 2018.

		Candidate	%	Votes
✔		Lucille Roybal-Allard (D)	77.3	93,938
		Rodolfo Cortes Barragan (G)	22.7	27,511

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 121,449
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
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Nonpartisan primary

Nonpartisan primary election for U.S. House California District 40

Incumbent Lucille Roybal-Allard (D) and Rodolfo Cortes Barragan (G) advanced from the primary for U.S. House California District 40 on June 5, 2018.

		Candidate	%	Votes
✔		Lucille Roybal-Allard (D)	80.3	35,636
✔		Rodolfo Cortes Barragan (G)	19.7	8,741

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	Incumbents are bolded and underlined. The results have been certified.	Total votes: 44,377
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
Do you want a spreadsheet of this type of data? Contact our sales team.

Previous election results

2016

See also: California's 40th Congressional District election, 2016

Heading into the election, Ballotpedia rated this race as safely Democratic. Incumbent Lucille Roybal-Allard (D) defeated Roman Gabriel Gonzalez (independent) in the general election on November 8, 2016. Both candidates advanced past the top-two primary on June 7, 2016, by default.

U.S. House, California District 40 General Election, 2016

Party		Candidate	Vote %	Votes
	Democratic	Lucille Roybal-Allard Incumbent	71.4%	106,554
	Independent	Roman Gonzalez	28.6%	42,743
Total Votes				149,297
Source: California Secretary of State

U.S. House, California District 40 General Primary, 2016

Party		Candidate	Vote %	Votes
	Democratic	Lucille Roybal-Allard Incumbent	76.3%	60,691
	Independent	Roman Gabriel Gonzalez	23.7%	18,844
Total Votes				79,535
Source: California Secretary of State

2014

See also: California's 40th Congressional District elections, 2014

The 40th Congressional District of California held an election for the U.S. House of Representatives on November 4, 2014. Incumbent Lucille Roybal-Allard (D) defeated David Sanchez (D) in the general election.

U.S. House, California District 40 General Election, 2014

Party		Candidate	Vote %	Votes
	Democratic	Lucille Roybal-Allard Incumbent	61.2%	30,208
	Democratic	David Sanchez	38.8%	19,171
Total Votes				49,379
Source: California Secretary of State

2012

See also: California's 40th Congressional District elections, 2012

The 40th Congressional District of California held an election for the U.S. House of Representatives on November 6, 2012. District 34 incumbent Lucille Roybal-Allard won election in the district.

U.S. House, California District 40 General Election, 2012

Party		Candidate	Vote %	Votes
	Democratic	Lucille Roybal-Allard Incumbent	58.9%	73,940
	Democratic	David Sanchez	41.1%	51,613
Total Votes				125,553
Source: California Secretary of State "Official Election Results, 2012 General Election"

2010
On November 2, 2010, Edward Royce won re-election to the United States House. He defeated Christina Avalos (D) in the general election.

U.S. House, California District 40 General Election, 2010
Party		Candidate	Vote %	Votes
	Republican	Edward Royce incumbent	66.8%	119,455
	Democratic	Christina Avalos	33.2%	59,400
Total Votes				178,855

2008
On November 4, 2008, Edward Royce won re-election to the United States House. He defeated Christina Avalos (D) in the general election.

U.S. House, California District 40 General Election, 2008
Party		Candidate	Vote %	Votes
	Republican	Edward Royce incumbent	62.5%	144,923
	Democratic	Christina Avalos	37.5%	86,772
Total Votes				231,695

2006
On November 7, 2006, Edward Royce won re-election to the United States House. He defeated Florice Orea Hoffman (D) and Philip Inman (L) in the general election.

U.S. House, California District 40 General Election, 2006
Party		Candidate	Vote %	Votes
	Republican	Edward Royce incumbent	66.8%	100,995
	Democratic	Florice Orea Hoffman	30.7%	46,418
	Libertarian	Philip Inman	2.6%	3,876
Total Votes				151,289

2004
On November 2, 2004, Edward Royce won re-election to the United States House. He defeated J. Tilman Williams (D) in the general election.

U.S. House, California District 40 General Election, 2004
Party		Candidate	Vote %	Votes
	Republican	Edward Royce incumbent	67.9%	147,617
	Democratic	J. Tilman Williams	32.1%	69,684
Total Votes				217,301

2002
On November 5, 2002, Edward Royce won re-election to the United States House. He defeated Christina Avalos (D) and Charles Roland McGlawn (L) in the general election.

U.S. House, California District 40 General Election, 2002
Party		Candidate	Vote %	Votes
	Republican	Edward Royce incumbent	67.6%	92,422
	Democratic	Christina Avalos	29.5%	40,265
	Libertarian	Charles Roland McGlawn	2.9%	3,955
Total Votes				136,642

2000
On November 7, 2000, Jerry Lewis won re-election to the United States House. He defeated Frank Schmit (Natural Law) and Marion Lindberg (L) in the general election.

U.S. House, California District 40 General Election, 2000
Party		Candidate	Vote %	Votes
	Republican	Jerry Lewis incumbent	79.9%	151,069
	Natural Law	Frank Schmit	10.1%	19,029
	Libertarian	Marion Lindberg	10%	18,924
Total Votes				189,022

1998
On November 3, 1998, Jerry Lewis won re-election to the United States House. He defeated Bob Conaway (D) and Maurice Maybena (L) in the general election.

U.S. House, California District 40 General Election, 1998
Party		Candidate	Vote %	Votes
	Republican	Jerry Lewis incumbent	64.9%	97,406
	Democratic	Bob Conaway	31.9%	47,897
	Libertarian	Maurice Maybena	3.2%	4,822
Total Votes				150,125

1996
On November 5, 1996, Jerry Lewis won re-election to the United States House. He defeated Bob Conaway (D), Hale McGee (American Independent) and Joseph Kelley (L) in the general election.

U.S. House, California District 40 General Election, 1996
Party		Candidate	Vote %	Votes
	Republican	Jerry Lewis incumbent	64.9%	98,821
	Democratic	Bob Conaway	29%	44,102
	American Independent	Hale McGee	3.3%	4,963
	Libertarian	Joseph Kelley	2.9%	4,375
Total Votes				152,261

1994
On November 8, 1994, Jerry Lewis won re-election to the United States House. He defeated Donald Rusk (D) in the general election.

U.S. House, California District 40 General Election, 1994
Party		Candidate	Vote %	Votes
	Republican	Jerry Lewis incumbent	70.7%	115,728
	Democratic	Donald Rusk	29.3%	48,003
Total Votes				163,731

1992
On November 3, 1992, Jerry Lewis won re-election to the United States House. He defeated Donald Rusk (D) and Margie Akin (P&F) in the general election.

U.S. House, California District 40 General Election, 1992
Party		Candidate	Vote %	Votes
	Republican	Jerry Lewis incumbent	63.1%	129,563
	Democratic	Donald Rusk	31.1%	63,881
	Peace and Freedom	Margie Akin	5.8%	11,839
Total Votes				205,283

1990
On November 6, 1990, Christopher Cox won re-election to the United States House. He defeated Eugene Gratz (D) in the general election.

U.S. House, California District 40 General Election, 1990
Party		Candidate	Vote %	Votes
	Republican	Christopher Cox incumbent	67.6%	142,299
	Democratic	Eugene Gratz	32.4%	68,087
Total Votes				210,386

District map

Redistricting

2025-2026

See also: Redistricting in California ahead of the 2026 elections

After Texas Republicans launched their congressional redistricting effort, California Gov. Gavin Newsom (D) tweeted on July 15, 2025, "two can play that game." In August 2025, California began taking official action toward congressional redistricting ahead of the 2026 elections. Redistricting in California required the passage of a constitutional amendment in a November special election to permit the adoption of a replacement map through 2030. On August 21, 2025, the California Legislature passed a redistricting plan setting a special election for a constitutional amendment to redraw the state's congressional district boundaries. Gov. Gavin Newsom (D) signed the two bills and scheduled a Nov. 4, 2025, special election. Voters approved the proposition by a 65%-35% vote, allowing the map that would make five districts more favorable to Democrats to take effect.

2020-2021

See also: Redistricting in California after the 2020 census

After the 2020 census, the California Citizens Redistricting Commission voted 14-0 in favor of a new congressional district map on December 20, 2021, and delivered those maps to the secretary of state on December 27, 2021. California was apportioned 52 seats in the U.S. House of Representatives after the 2020 census, a net loss of one seat compared to apportionment after the 2010 census. This map took effect for California's 2022 congressional elections.

How does redistricting in California work? In California, a non-politician commission draws both congressional and state legislative district lines. Established in 2008 by ballot initiative, the commission comprises 14 members: five Democrats, five Republicans, and four belonging to neither party. A panel of state auditors selects the pool of nominees from which the commissioners are appointed. This pool comprises 20 Democrats, 20 Republicans, and 20 belonging to neither party. The majority and minority leaders of both chambers of the state legislature may each remove two members from each of the aforementioned groups. The first eight commission members are selected at random from the remaining nominees. These first eight comprise three Democrats, three Republicans, and two belonging to neither party. The first eight commissioners appoint the remaining six, which must include two Democrats, two Republicans, and two belonging to neither party.

Commissioners must meet the following requirements in order to serve:

1. Members must have voted in at least two of the last three statewide elections.
2. Members cannot have switched party affiliation for at least five years.
3. "Neither commissioners nor immediate family may have been, within 10 years of appointment, a candidate for federal or state office or member of a party central committee; an officer, employee, or paid consultant to a federal or state candidate or party; a registered lobbyist or paid legislative staff; or a donor of more than $2,000 to an elected candidate."
4. Members cannot be "staff, consultants or contractors for state or federal government" while serving as commissioners. The same prohibition applies to the family of commission members.

In order to approve a redistricting plan, nine of the commission's 14 members must vote for it. These nine must include three Democrats, three Republicans, and three belonging to neither party. Maps drawn by the commission may be overturned by public referendum. In the event that a map is overturned by the public, the California Supreme Court must appoint a group to draw a new map.

The California Constitution requires that districts be contiguous. Further, the state constitution mandates that "to the extent possible, [districts] must ... preserve the geographic integrity of cities, counties, neighborhoods and communities of interest." Districts must also "encourage compactness." State Senate and Assembly districts should be nested within each other where possible.

2020

2024

2010-2011

This is the 40th Congressional District of California after the 2001 redistricting process.

See also: Redistricting in California after the 2010 census

In 2011, the California State Legislature re-drew the congressional districts based on updated population information from the 2010 census.

District analysis

See also: The Cook Political Report's Partisan Voter Index

See also: FiveThirtyEight's elasticity scores

2026

Heading into the 2026 elections, based on results from the 2024 and 2020 presidential elections, the Cook Partisan Voter Index for this district is R+1. This meant that in those two presidential elections, this district's results were 1 percentage points more Republican than the national average. This made California's 40th the 217th most Republican district nationally.

2024

Heading into the 2024 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was R+2. This meant that in those two presidential elections, this district's results were 2 percentage points more Republican than the national average. This made California's 40th the 215th most Republican district nationally.

Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Joe Biden (D) would have defeated Donald Trump (R) 49.9%-48.0%.

2022

Heading into the 2022 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was R+2. This meant that in those two presidential elections, this district's results were 2 percentage points more Republican than the national average. This made California's 40th the 214th most Republican district nationally.

Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Joe Biden (D) would have received 49.9% of the vote in this district and Donald Trump (R) would have received 48.0%.

2018

Heading into the 2018 elections, based on results from the 2016 and 2012 presidential elections, the Cook Partisan Voter Index for this district was D+33. This meant that in those two presidential elections, this district's results were 33 percentage points more Democratic than the national average. This made California's 40th Congressional District the 18th most Democratic nationally.

FiveThirtyEight's September 2018 elasticity score for states and congressional districts measured "how sensitive it is to changes in the national political environment." This district's elasticity score was 1.05. This means that for every 1 point the national political mood moved toward a party, the district was expected to move 1.05 points toward that party.

See also

• Redistricting in California
• California's 40th Congressional District election, 2024
• California's 40th Congressional District election, 2022
• California's 40th Congressional District election, 2020
• California's 40th Congressional District election, 2018

External links

• GovTrack District 40

Footnotes

[show]

California's current delegation to the United States Congress

Senators

Alex Padilla (D)

Adam Schiff (D)

Representatives

District 1

Doug LaMalfa (R)

District 2

Jared Huffman (D)

District 3

Kevin Kiley (R)

District 4

Mike Thompson (D)

District 5

Tom McClintock (R)

District 6

Ami Bera (D)

District 7

Doris Matsui (D)

District 8

John Garamendi (D)

District 9

Josh Harder (D)

District 10

Mark DeSaulnier (D)

District 11

Nancy Pelosi (D)

District 12

Lateefah Simon (D)

District 13

Adam Gray (D)

District 14

Eric Swalwell (D)

District 15

Kevin Mullin (D)

District 16

Sam Liccardo (D)

District 17

Ro Khanna (D)

District 18

Zoe Lofgren (D)

District 19

Jimmy Panetta (D)

District 20

Vince Fong (R)

District 21

Jim Costa (D)

District 22

David Valadao (R)

District 23

Jay Obernolte (R)

District 24

Salud Carbajal (D)

District 25

Raul Ruiz (D)

District 26

Julia Brownley (D)

District 27

George Whitesides (D)

District 28

Judy Chu (D)

District 29

Luz Rivas (D)

District 30

Laura Friedman (D)

District 31

Gil Cisneros (D)

District 32

Brad Sherman (D)

District 33

Pete Aguilar (D)

District 34

Jimmy Gomez (D)

District 35

Norma Torres (D)

District 36

Ted Lieu (D)

District 37

Sydney Kamlager-Dove (D)

District 38

Linda Sánchez (D)

District 39

Mark Takano (D)

District 40

Young Kim (R)

District 41

Ken Calvert (R)

District 42

Robert Garcia (D)

District 43

Maxine Waters (D)

District 44

Nanette Barragán (D)

District 45

Derek Tran (D)

District 46

Lou Correa (D)

District 47

Dave Min (D)

District 48

Darrell Issa (R)

District 49

Mike Levin (D)

District 50

Scott Peters (D)

District 51

Sara Jacobs (D)

District 52

Juan Vargas (D)

Democratic Party (45)

Republican Party (9)