| District | Incumbent | This race |
| Location | PVI | Member | Party | First elected | Results | Candidates |
| California 1 | R+10 | Doug LaMalfa | Republican | 2012 | Incumbent re-elected. | ▌Y Doug LaMalfa (Republican) 59.1%▌Jim Reed (Democratic) 40.9% |
| California 2 | D+20 | Jared Huffman | Democratic | 2012 | Incumbent re-elected. | ▌Y Jared Huffman (Democratic) 76.9%▌Dale Mensing (Republican) 23.1% |
| California 3 | D+3 | John Garamendi | Democratic | 2009 | Incumbent re-elected. | ▌Y John Garamendi (Democratic) 59.4%▌Eugene Cleek (Republican) 40.6% |
| California 4 | R+10 | Tom McClintock | Republican | 2008 | Incumbent re-elected. | ▌Y Tom McClintock (Republican) 62.7%▌Bob Derlet (Democratic) 37.3% |
| California 5 | D+19 | Mike Thompson | Democratic | 1998 | Incumbent re-elected. | ▌Y Mike Thompson (Democratic) 76.9%▌Carlos Santamaria (Republican) 23.1% |
| California 6 | D+18 | Doris Matsui | Democratic | 2005 | Incumbent re-elected. | ▌Y Doris Matsui (Democratic) 75.4%▌Bob Evans (Republican) 24.6% |
| California 7 | EVEN | Ami Bera | Democratic | 2012 | Incumbent re-elected. | ▌Y Ami Bera (Democratic) 51.2%▌Scott Jones (Republican) 48.8% |
| California 8 | R+10 | Paul Cook | Republican | 2012 | Incumbent re-elected. | ▌Y Paul Cook (Republican) 62.3%▌Rita Ramirez (Democratic) 37.7% |
| California 9 | D+6 | Jerry McNerney | Democratic | 2006 | Incumbent re-elected. | ▌Y Jerry McNerney (Democratic) 57.4%▌Tony Amador (Republican) 42.6% |
| California 10 | R+1 | Jeff Denham | Republican | 2010 | Incumbent re-elected. | ▌Y Jeff Denham (Republican) 51.7%▌Michael Eggman (Democratic) 48.3% |
| California 11 | D+17 | Mark DeSaulnier | Democratic | 2014 | Incumbent re-elected. | ▌Y Mark DeSaulnier (Democratic) 72.1%▌Roger Allen Petersen (Republican) 27.9% |
| California 12 | D+34 | Nancy Pelosi | Democratic | 1987 | Incumbent re-elected. | ▌Y Nancy Pelosi (Democratic) 80.9%▌Preston Picus (No Party Preference) 19.1% |
| California 13 | D+37 | Barbara Lee | Democratic | 1998 | Incumbent re-elected. | ▌Y Barbara Lee (Democratic) 90.8%▌Sue Caro (Republican) 9.2% |
| California 14 | D+23 | Jackie Speier | Democratic | 2008 | Incumbent re-elected. | ▌Y Jackie Speier (Democratic) 80.9%▌Angel Cardenas (Republican) 19.1% |
| California 15 | D+16 | Eric Swalwell | Democratic | 2012 | Incumbent re-elected. | ▌Y Eric Swalwell (Democratic) 73.8%▌Danny Turner (Republican) 26.2% |
| California 16 | D+7 | Jim Costa | Democratic | 2004 | Incumbent re-elected. | ▌Y Jim Costa (Democratic) 58.0%▌Johnny Tacherra (Republican) 42.0% |
| California 17 | D+20 | Mike Honda | Democratic | 2000 | Incumbent lost re-election.Democratic hold. | ▌Y Ro Khanna (Democratic) 61.0%▌Mike Honda (Democratic) 39.0% |
| California 18 | D+18 | Anna Eshoo | Democratic | 1992 | Incumbent re-elected. | ▌Y Anna Eshoo (Democratic) 71.1%▌Richard B. Fox (Republican) 28.9% |
| California 19 | D+19 | Zoe Lofgren | Democratic | 1994 | Incumbent re-elected. | ▌Y Zoe Lofgren (Democratic) 73.9%▌G. Burt Lancaster (Republican) 26.1% |
| California 20 | D+21 | Sam Farr | Democratic | 1993 | Incumbent retired.Democratic hold. | ▌Y Jimmy Panetta (Democratic) 70.8%▌Casey Lucius (Republican) 29.2% |
| California 21 | D+2 | David Valadao | Republican | 2012 | Incumbent re-elected. | ▌Y David Valadao (Republican) 56.7%▌Emilio Huerta (Democratic) 43.3% |
| California 22 | R+10 | Devin Nunes | Republican | 2002 | Incumbent re-elected. | ▌Y Devin Nunes (Republican) 67.6%▌Louie Campos (Democratic) 32.4% |
| California 23 | R+16 | Kevin McCarthy | Republican | 2006 | Incumbent re-elected. | ▌Y Kevin McCarthy (Republican) 69.2%▌Wendy Reed (Democratic) 30.8% |
| California 24 | D+4 | Lois Capps | Democratic | 1998 | Incumbent retired.Democratic hold. | ▌Y Salud Carbajal (Democratic) 53.4%▌Justin Fareed (Republican) 46.6% |
| California 25 | R+3 | Steve Knight | Republican | 2014 | Incumbent re-elected. | ▌Y Steve Knight (Republican) 53.1%▌Bryan Caforio (Democratic) 46.9% |
| California 26 | D+4 | Julia Brownley | Democratic | 2012 | Incumbent re-elected. | ▌Y Julia Brownley (Democratic) 60.4%▌Rafael Dagnesses (Republican) 39.6% |
| California 27 | D+11 | Judy Chu | Democratic | 2009 | Incumbent re-elected. | ▌Y Judy Chu (Democratic) 67.4%▌Jack Orswell (Republican) 32.6% |
| California 28 | D+20 | Adam Schiff | Democratic | 2000 | Incumbent re-elected. | ▌Y Adam Schiff (Democratic) 78.0%▌Lenore Solis (Republican) 22.0% |
| California 29 | D+25 | Tony Cárdenas | Democratic | 2012 | Incumbent re-elected. | ▌Y Tony Cárdenas (Democratic) 74.7%▌Richard Alarcon (Democratic) 25.3% |
| California 30 | D+14 | Brad Sherman | Democratic | 1996 | Incumbent re-elected. | ▌Y Brad Sherman (Democratic) 72.6%▌Mark Reed (Republican) 27.4% |
| California 31 | D+5 | Pete Aguilar | Democratic | 2014 | Incumbent re-elected. | ▌Y Pete Aguilar (Democratic) 56.1%▌Paul Chabot (Republican) 43.9% |
| California 32 | D+12 | Grace Napolitano | Democratic | 1998 | Incumbent re-elected. | ▌Y Grace Napolitano (Democratic) 61.6%▌Roger Hernandez (Democratic) 38.4% |
| California 33 | D+11 | Ted Lieu | Democratic | 2014 | Incumbent re-elected. | ▌Y Ted Lieu (Democratic) 66.4%▌Kenneth Wright (Republican) 33.6% |
| California 34 | D+30 | Xavier Becerra | Democratic | 1992 | Incumbent re-elected. | ▌Y Xavier Becerra (Democratic) 77.2%▌Adrienne Edwards (Democratic) 22.8% |
| California 35 | D+15 | Norma Torres | Democratic | 2014 | Incumbent re-elected. | ▌Y Norma Torres (Democratic) 72.4%▌Tyler Fischella (Republican) 27.6% |
| California 36 | R+1 | Raul Ruiz | Democratic | 2012 | Incumbent re-elected. | ▌Y Raul Ruiz (Democratic) 62.1%▌Jeff Stone (Republican) 37.9% |
| California 37 | D+34 | Karen Bass | Democratic | 2010 | Incumbent re-elected. | ▌Y Karen Bass (Democratic) 81.1%▌Chris Wiggins (Democratic) 18.9% |
| California 38 | D+12 | Linda Sánchez | Democratic | 2002 | Incumbent re-elected. | ▌Y Linda Sánchez (Democratic) 70.5%▌Ryan Downing (Republican) 29.5% |
| California 39 | R+5 | Ed Royce | Republican | 1992 | Incumbent re-elected. | ▌Y Ed Royce (Republican) 57.2%▌Brett Murdock (Democratic) 42.8% |
| California 40 | D+29 | Lucille Roybal-Allard | Democratic | 1992 | Incumbent re-elected. | ▌Y Lucille Roybal-Allard (Democratic) 71.4%▌Roman Gabriel Gonzalez (No Party Preference) 28.6% |
| California 41 | D+9 | Mark Takano | Democratic | 2012 | Incumbent re-elected. | ▌Y Mark Takano (Democratic) 65.0%▌Doug Shepherd (Republican) 35.0% |
| California 42 | R+10 | Ken Calvert | Republican | 1992 | Incumbent re-elected. | ▌Y Ken Calvert (Republican) 58.8%▌Tim Sheridan (Democratic) 41.2% |
| California 43 | D+26 | Maxine Waters | Democratic | 1990 | Incumbent re-elected. | ▌Y Maxine Waters (Democratic) 76.1%▌Omar Navarro (Republican) 23.9% |
| California 44 | D+32 | Janice Hahn | Democratic | 2011 | Incumbent retired to run for the Los Angeles County Board of Supervisors.Democratic hold. | ▌Y Nanette Barragán (Democratic) 52.2%▌Isadore Hall III (Democratic) 47.8% |
| California 45 | R+7 | Mimi Walters | Republican | 2014 | Incumbent re-elected. | ▌Y Mimi Walters (Republican) 58.6%▌Ron Varasteh (Democratic) 41.4% |
| California 46 | D+9 | Loretta Sanchez | Democratic | 1996 | Incumbent retired to run for U.S. Senator.Democratic hold. | ▌Y Lou Correa (Democratic) 70.0%▌Bao Nguyen (Democratic) 30.0% |
| California 47 | D+8 | Alan Lowenthal | Democratic | 2012 | Incumbent re-elected. | ▌Y Alan Lowenthal (Democratic) 63.7%▌Andy Whallon (Republican) 36.3% |
| California 48 | R+7 | Dana Rohrabacher | Republican | 1988 | Incumbent re-elected. | ▌Y Dana Rohrabacher (Republican) 58.3%▌Suzanne Savary (Democratic) 41.7% |