House districts / California
California's 42nd congressional district
CA-42. Redrawn for 2026: the November 2026 election is on new lines. The outline shows the 2024 district with the same number.
Fundraising
- Robert Garcia Das of Oct 14, 2026Raised $3.4mSpent $2.2m · Cash $1.6m
- Brian J Burley Ras of Oct 14, 2026Raised $251kSpent $255k · Cash $2k
2 other 2026 candidates filed reports (primary candidates). 4 other candidates have not filed.
Federal Election Commission, candidate totals, public domain.
President in this district
PollCheck calculation from precinct returns on the 2026 lines (method).
| Year | Democrat | Republican | Other | Margin | 2024 lines |
|---|---|---|---|---|---|
| 2024 | Harris 52.9% | Trump 43.5% | 3.6% | D+9.4 | D+32.4 |
| 2020 | Biden 58.7% | Trump 39.0% | 2.3% | D+19.8 | D+45.8 |
| 2016 | Clinton 55.3% | Trump 38.1% | 6.6% | D+17.2 | D+50.7 |
Who lives here
| Measure | This district | US |
|---|---|---|
| People | ||
| Population | 757,992 | |
| Adults (18+) | 620,533 | |
| Citizens, % of adults* | 88.6% | 92.1% |
| Age, % of adults | ||
| 18 to 29* | 20.7% | 20.3% |
| 30 to 44* | 27.0% | 25.9% |
| 45 to 64* | 32.0% | 31.8% |
| 65 and over* | 20.3% | 22.0% |
| Race and Hispanic origin, % of residents | ||
| White | 45.3% | 57.8% |
| Black | 5.4% | 12.1% |
| Hispanic | 31.7% | 18.7% |
| Asian | 11.6% | 5.9% |
| Other or more than one | 6.0% | 5.5% |
| Education and income | ||
| Bachelor's degree or higher, % of 25+* | 45.4% | 35.7% |
| Median household income* | $105,203 | $80,734 |
* Estimated for the 2026 lines from census blocks (ACS 2020-2024). Population, adults and race: 2020 Census, counted on the 2026 lines. The tick marks the US figure.
Winning margin
Results since 1976
| Year | Winner | Share | Runner-up | Share | Margin |
|---|---|---|---|---|---|
| 2024 lines, elections 2022-2024: redrawn for 2026 seat count changed from 53 to 52 after the census | |||||
| 2024 | Robert Garcia Democrat | 68.1% | John Briscoe Republican | 31.9% | D+36.3 |
| 2022 | Robert Garcia Democrat | 68.4% | John Briscoe Republican | 31.6% | D+36.7 |
| Earlier lines, elections 2012-2020 post-census redistricting | |||||
| 2020 | Ken Calvert Republican | 57.1% | William “Liam” O’Mara Democrat | 42.9% | R+14.3 |
| 2018 | Ken Calvert Republican | 56.5% | Julia C. Peacock Democrat | 43.5% | R+13.0 |
| 2016 | Ken Calvert Republican | 58.8% | Tim Sheridan Democrat | 41.2% | R+17.6 |
| 2014 | Ken Calvert Republican | 65.7% | Tim Sheridan Democrat | 34.3% | R+31.5 |
| 2012 | Ken Calvert Republican | 60.6% | Michael Williamson Democrat | 39.4% | R+21.2 |
| Earlier lines, elections 2002-2010 seat count changed from 52 to 53 after the census | |||||
| 2010 | Gary G. Miller Republican | 62.2% | Michael Williamson Democrat others 5.9% | 31.9% | R+30.4 |
| 2008 | Gary G. Miller Republican | 60.2% | Edwin "Ed" Chau Democrat | 39.8% | R+20.3 |
| 2006 | Gary G. Miller Republican | 100.0% | R+100.0 | ||
| 2004 | Gary G. Miller Republican | 68.1% | Lewis Myers Democrat | 31.9% | R+36.3 |
| 2002 | Gary G. Miller Republican | 67.8% | Richard Waldron Democrat others 3.2% | 29.0% | R+38.8 |
| Earlier lines, elections 1992-2000 seat count changed from 45 to 52 after the census | |||||
| 2000 | Joe Baca Democrat | 59.8% | Elia Pirozzi Republican others 5.1% | 35.1% | D+24.6 |
| 1998 | George E. Brown, Jr. Democrat | 55.3% | Elia Pirozzi Republican others 4.4% | 40.3% | D+15.0 |
| 1996 | George E. Brown Jr. Democrat | 50.5% | Linda M. Wilde Republican | 49.5% | D+1.0 |
| 1994 | George E. Brown, Jr. Democrat | 51.1% | Rob Guzman Republican others 0.1% | 48.8% | D+2.3 |
| 1992 | George E. Brown, Jr. Democrat | 50.7% | Dick Rutan Republican others 5.3% | 44.0% | D+6.7 |
| Earlier lines, elections 1982-1990 seat count changed from 43 to 45 after the census | |||||
| 1990 | Dana Rohrabacher Republican | 59.3% | Guy C. Kimbrough Democrat others 4.2% | 36.5% | R+22.9 |
| 1988 | Dana Rohrabacher Republican | 64.2% | Guy C. Kimbrough Democrat others 2.8% | 33.0% | R+31.2 |
| 1986 | Daniel E. Lungren Republican | 72.8% | Michael P. Blackburn Democrat others 2.5% | 24.7% | R+48.1 |
| 1984 | Dan Lungren Republican | 73.0% | Mary Lou Brophy Democrat others 2.4% | 24.6% | R+48.3 |
| 1982 | Dan Lungren Republican | 69.0% | James P. Spellman Democrat others 2.7% | 28.4% | R+40.6 |
| Earlier lines, elections 1976-1980 | |||||
| 1980 | Duncan L. Hunter Republican | 53.3% | Lionel Van Deerlin Democrat | 46.7% | R+6.5 |
| 1978 | Lionel Van Deerlin Democrat | 73.7% | Lawrence C. Mattera Republican | 26.3% | D+47.5 |
| 1976 | Lionel Van Deerlin Democrat | 76.0% | Wes Marden Republican | 24.0% | D+52.0 |
More on California
Other California districts
About these results
Shares count all candidate votes, including write-ins, with a candidate's votes on several party lines added together. Each result is on the lines in force at the time. Mid-decade redraws before 2016 may be unmarked.
President in this district: 2016 and 2020, and 2024 on the new lines, are estimates: precinct votes are split between districts by census block. The last column is the margin in CA-42 on the 2024 lines.
Counties only partly inside the district show the 2024 result for that part; estimates are labelled.
Margin chart: winner minus runner-up. Gaps are unopposed races; dashed lines are new district lines.
Who lives here (2026 lines) is estimated from Census survey figures split by population.
Sources
Results: MIT Election Data and Science Lab, U.S. House 1976-2016 (doi:10.7910/DVN/IG0UN2, CC0; via MEDSL/constituency-returns), and Clerk of the US House, Statistics of the Presidential and Congressional Election 2018-2024 (public domain).
Presidential results: PollCheck calculation from MIT Election Data and Science Lab 2024 precinct returns (doi:10.7910/DVN/XDJYKC, doi:10.7910/DVN/USBYR4, CC0; state totals doi:10.7910/DVN/42MVDX, CC0) and Voting and Election Science Team 2016 and 2020 precinct results and shapes (doi:10.7910/DVN/NH5S2I, doi:10.7910/DVN/K7760H, CC BY 4.0), with US Census Bureau 2020 block populations and block equivalency files (public domain). Official figures: Texas Legislative Council (2024 on the 2026 lines); Louisiana, New Jersey, California and Washington election offices (county totals). Certified results transcribed by Wikipedia (CC BY-SA 4.0): Maine 2024 by district: 2024 United States presidential election in Maine (revision 1382530995); Indiana county totals: 2024 United States presidential election in Indiana (revision 1382505975); Oregon county totals: 2024 United States presidential election in Oregon (revision 1382605746).
District lines: US Census Bureau TIGER/Line 2026 (120th Congress) and 2025 cartographic boundary files (119th Congress), public domain.
Members: unitedstates/congress-legislators (CC0).
Counties: US Census Bureau 2024 cartographic boundary file (public domain); 2024 county results summed from the same MEDSL precinct returns, with the official county totals above.
Demographics: US Census Bureau, American Community Survey 5-year estimates 2020-2024; 2020 Census P.L. 94-171 (public domain).
2028 candidates: Federal Election Commission (public domain).
Photos: official portraits, public domain (US government); see Photo credits.
PollCheck US. Data through November 5, 2026. Photo credits