2010 United States House of Representatives elections in California

The 2010 United States House of Representatives elections in California were held on November 2, 2010 to determine who would represent California's various congressional districts in the United States House of Representatives. In the 112th Congress, California has 53 seats in the House, apportioned accordingly after the 2000 United States census. Representatives were elected to two-year terms; those elected serve in the 112th Congress from January 3, 2011 to January 3, 2013.

According to CQ Politics, the districts considered the most competitive are the 3rd and 11th, with the 44th, 45th, and 47th as less than safe as well. The Cook Report includes the 18th and 20th.

Two districts elected new Representatives that year. Republican George Radanovich of the 19th district was succeeded by Republican Jeff Denham, and Democrat Diane Watson of the 33rd district was succeeded by Democrat Karen Bass. However, the partisan balance of the state's congressional delegation did not change, despite the strong Republican dominance in a multitude of other areas of the country.

By district
Results of the 2010 United States House of Representatives elections in California by district:

District 1
California's 1st congressional district (map) has been represented by Democrat Mike Thompson of St. Helena since January 3, 1999.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 2
California's 2nd congressional district (map) has been represented by Republican Wally Herger of Chico since January 3, 1987.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 3
California's 3rd congressional district (map) has been represented by Republican Dan Lungren of Gold River since January 3, 2005. In May 2016, Babulal Bera, Ami Bera's father, pleaded guilty to two felony counts of election fraud affecting the 2010 and 2012 elections, and was convicted of illegally funneling $250,000 to Bera's campaigns between 2010 and 2012.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 4
California's 4th congressional district (map) has been represented by Republican Tom McClintock of Roseville since January 3, 2009.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 5
California's 5th congressional district (map) has been represented by Democrat Doris Matsui of Sacramento since March 8, 2005.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 6
California's 6th congressional district (map) has been represented by Democrat Lynn Woolsey of Petaluma since January 3, 1993.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 7
California's 7th congressional district (map) has been represented by Democrat George Miller of Martinez since January 3, 1975.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 8
California's 8th congressional district (map) has been represented by Democrat Nancy Pelosi of San Francisco since January 3, 1993, when she was redistricted from the 5th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 9
California's 9th congressional district (map) has been represented by Democrat Barbara Lee of Oakland since April 7, 1998.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 10
California's 10th congressional district (map) has been represented by Democrat John Garamendi of Walnut Grove since November 5, 2009.
 * CA - District 10 from OurCampaigns.com
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 11
California's 11th congressional district (map) has been represented by Democrat Jerry McNerney of Pleasanton since January 3, 2007.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 12
California's 12th congressional district (map) has been represented by Democrat Jackie Speier of Hillsborough since April 10, 2008.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 13
California's 13th congressional district (map) has been represented by Democrat Pete Stark of Fremont since January 3, 1993, when he was redistricted from the 9th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 14
California's 14th congressional district (map) has been represented by Democrat Anna Eshoo of Atherton since January 3, 1993.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 15
California's 15th congressional district (map) has been represented by Democrat Mike Honda of San Jose since January 3, 2001.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 16
California's 16th congressional district (map) has been represented by Democrat Zoe Lofgren of San Jose since January 3, 1993.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 17
California's 17th congressional district (map) has been represented by Democrat Sam Farr of Carmel-by-the-Sea since June 8, 1993.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 18
California's 18th congressional district (map) has been represented by Democrat Dennis Cardoza of Atwater since January 3, 2003.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 19
California's 19th congressional district (map) has been represented by Republican George Radanovich of Mariposa since January 3, 1995. Radanovich did not run for reelection.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 20
California's 20th congressional district (map) has been represented by Democrat Jim Costa of Fresno since January 3, 2005.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 21
California's 21st congressional district (map) has been represented by Republican Devin Nunes of Tulare since January 3, 2003.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 22
California's 22nd congressional district (map) has been represented by Republican Kevin McCarthy of Bakersfield since January 3, 2007.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 23
California's 23rd congressional district (map) has been represented by Democrat Lois Capps of Santa Barbara since January 3, 2003, when she was redistricted from the 22nd district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 24
California's 24th congressional district (map) has been represented by Republican Elton Gallegly of Simi Valley since January 3, 2003, when he was redistricted from the 23rd district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 25
California's 25th congressional district (map) has been represented by Republican Howard McKeon of Santa Clarita since January 3, 1993.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 26
California's 26th congressional district (map) has been represented by Republican David Dreier of San Dimas since January 3, 2003, when he was redistricted from the 28th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 27
California's 27th congressional district (map) has been represented by Democrat Brad Sherman of Sherman Oaks since January 3, 2003, when he was redistricted from the 24th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 28
California's 28th congressional district (map) has been represented by Democrat Howard Berman of North Hollywood since January 3, 2003, when he was redistricted from the 26th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 29
California's 29th congressional district (map) has been represented by Democrat Adam Schiff of Burbank since January 3, 2003, when he was redistricted from the 27th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 30
California's 30th congressional district (map) has been represented by Democrat Henry Waxman of Los Angeles since January 3, 2003, when he was redistricted from the 29th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 31
California's 31st congressional district (map) has been represented by Democrat Xavier Becerra of Los Angeles since January 3, 2003, when he was redistricted from the 30th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 32
California's 32nd congressional district (map) has been represented by Democrat Judy Chu of Monterey Park since July 14, 2009.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 33
California's 33rd congressional district (map) has been represented by Democrat Diane Watson of Los Angeles since January 3, 2003, when she was redistricted from the 32nd district. Watson did not run for reelection.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 34
California's 34th congressional district (map) has been represented by Democrat Lucille Roybal-Allard of Los Angeles since January 3, 2003, when she was redistricted from the 33rd district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 35
California's 35th congressional district (map) has been represented by Democrat Maxine Waters of Los Angeles since January 3, 1993, when she was redistricted from the 29th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 36
California's 36th congressional district (map) has been represented by Democrat Jane Harman of Venice since January 3, 2001.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 37
California's 37th congressional district (map) has been represented by Democrat Laura Richardson of Long Beach since August 21, 2007.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 38
California's 38th congressional district (map) has been represented by Democrat Grace Napolitano of Norwalk since January 3, 2003, when she was redistricted from the 34th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 39
California's 39th congressional district (map) has been represented by Democrat Linda Sánchez of Lakewood since January 3, 2003.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 40
California's 40th congressional district (map) has been represented by Republican Ed Royce of Fullerton since January 3, 2003, when he was redistricted from the 39th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 41
California's 41st congressional district (map) has been represented by Republican Jerry Lewis of Redlands since January 3, 2003, when he was redistricted from the 40th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 42
California's 42nd congressional district (map) has been represented by Republican Gary Miller of Diamond Bar since January 3, 2003, when he was redistricted from the 41st district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 43
California's 43rd congressional district (map) has been represented by Democrat Joe Baca of Rialto since January 3, 2003, when he was redistricted from the 42nd district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 44
California's 44th congressional district (map) has been represented by Republican Ken Calvert of Corona since January 3, 2003, when he was redistricted from the 43rd district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 45
California's 45th congressional district (map) has been represented by Republican Mary Bono Mack of Palm Springs since January 3, 2003, when she was redistricted from the 44th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 46
California's 46th congressional district (map) has been represented by Republican Dana Rohrabacher of Huntington Beach since January 3, 2003, when he was redistricted from the 45th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 47
California's 47th congressional district (map) has been represented by Democrat Loretta Sanchez of Anaheim since January 3, 2003, when she was redistricted from the 46th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 48
California's 48th congressional district (map) has been represented by Republican John Campbell of Irvine since January 3, 2005.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 49
California's 49th congressional district (map) has been represented by Republican Darrell Issa of Vista since January 3, 2003, when he was redistricted from the 48th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 50
California's 50th congressional district (map) has been represented by Republican Brian Bilbray of Carlsbad since June 13, 2006.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 51
California's 51st congressional district (map) has been represented by Democrat Bob Filner of San Diego since January 3, 2003, when he was redistricted from the 50th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 52
California's 52nd congressional district (map) has been represented by Republican Duncan D. Hunter of Lakeside since January 3, 2009.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times

District 53
California's 53rd congressional district (map) has been represented by Democrat Susan Davis of San Diego since January 3, 2003, when she was redistricted from the 49th district.
 * Race ranking and details from CQ Politics
 * Campaign contributions from OpenSecrets
 * Race profile at The New York Times