House districts / California
California's 1st congressional district
CA-1. Redrawn for 2026: the November 2026 election is on new lines. The outline shows the 2024 district with the same number.
Fundraising
- Mike Mcguire Das of Oct 14, 2026Raised $2.3mSpent $2.1m · Cash $154k
- James Gallagher Ras of Oct 14, 2026Raised $2.0mSpent $1.7m · Cash $328k
4 other 2026 candidates filed reports (primary candidates). 7 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 54.6% | Trump 42.1% | 3.3% | D+12.5 | R+24.9 |
| 2020 | Biden 57.6% | Trump 39.8% | 2.6% | D+17.8 | R+19.0 |
| 2016 | Clinton 53.0% | Trump 39.3% | 7.7% | D+13.7 | R+21.8 |
Who lives here
| Measure | This district | US |
|---|---|---|
| People | ||
| Population | 765,487 | |
| Adults (18+) | 605,483 | |
| Citizens, % of adults* | 91.6% | 92.1% |
| Age, % of adults | ||
| 18 to 29* | 19.6% | 20.3% |
| 30 to 44* | 24.4% | 25.9% |
| 45 to 64* | 30.3% | 31.8% |
| 65 and over* | 25.7% | 22.0% |
| Race and Hispanic origin, % of residents | ||
| White | 60.4% | 57.8% |
| Black | 1.6% | 12.1% |
| Hispanic | 26.4% | 18.7% |
| Asian | 3.6% | 5.9% |
| Other or more than one | 8.0% | 5.5% |
| Education and income | ||
| Bachelor's degree or higher, % of 25+* | 29.0% | 35.7% |
| Median household income* | $78,162 | $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 | Doug LaMalfa Republican | 65.3% | Rose Penelope Yee Democrat | 34.7% | R+30.7 |
| 2022 | Doug LaMalfa Republican | 62.1% | Max Steiner Democrat | 37.9% | R+24.1 |
| Earlier lines, elections 2012-2020 post-census redistricting | |||||
| 2020 | Doug LaMalfa Republican | 57.0% | Audrey Denney Democrat | 43.0% | R+14.0 |
| 2018 | Doug LaMalfa Republican | 54.9% | Audrey Denney Democrat | 45.1% | R+9.8 |
| 2016 | Doug LaMalfa Republican | 59.0% | Jim Reed Democrat | 41.0% | R+18.1 |
| 2014 | Doug LaMalfa Republican | 61.0% | Heidi Hall Democrat | 39.0% | R+22.1 |
| 2012 | Doug La Malfa Republican | 57.4% | Jim Reed Democrat | 42.6% | R+14.8 |
| Earlier lines, elections 2002-2010 seat count changed from 52 to 53 after the census | |||||
| 2010 | Mike Thompson Democrat | 62.8% | Loren Hanks Republican others 6.2% | 31.0% | D+31.8 |
| 2008 | Mike Thompson Democrat | 68.1% | Zane Starkewolf Republican others 8.5% | 23.4% | D+44.7 |
| 2006 | Mike Thompson Democrat | 66.2% | John W. Jones Republican others 4.8% | 29.0% | D+37.2 |
| 2004 | Mike Thompson Democrat | 66.9% | Lawrence R. Wiesner Republican others 4.8% | 28.3% | D+38.7 |
| 2002 | Mike Thompson Democrat | 64.1% | Lawrence R. Wiesner Republican others 3.5% | 32.4% | D+31.7 |
| Earlier lines, elections 1992-2000 seat count changed from 45 to 52 after the census | |||||
| 2000 | Mike Thompson Democrat | 65.0% | Russel J. "Jim" Chase Republican others 7.0% | 28.0% | D+37.0 |
| 1998 | Mike Thompson Democrat | 61.8% | Mark C. Luce Republican others 5.3% | 32.9% | D+29.0 |
| 1996 | Frank Riggs Republican | 49.6% | Michela Alioto Democrat others 6.9% | 43.5% | R+6.2 |
| 1994 | Frank Riggs Republican | 53.3% | Dan Hamburg Democrat | 46.7% | R+6.6 |
| 1992 | Dan Hamburg Democrat | 47.6% | Frank D. Riggs Republican others 7.3% | 45.1% | D+2.5 |
| Earlier lines, elections 1982-1990 seat count changed from 43 to 45 after the census | |||||
| 1990 | Frank Riggs Republican | 43.3% | Douglas H. Bosco Democrat others 14.8% | 41.9% | R+1.4 |
| 1988 | Douglas H, Bosco Democrat | 62.9% | Samuel "Mar" Vanderbilt Republican others 8.7% | 28.4% | D+34.5 |
| 1986 | Douglas H. Bosco Democrat | 67.5% | Floyd G. Sampson Republican others 5.9% | 26.6% | D+40.9 |
| 1984 | Douglas H. Bosco Democrat | 62.3% | David Redick Republican | 37.7% | D+24.5 |
| 1982 | Douglas H. Bosco Democrat | 49.9% | Don H. Clausen Republican others 3.0% | 47.2% | D+2.6 |
| Earlier lines, elections 1976-1980 | |||||
| 1980 | Eugene A. Chappie Republican | 53.7% | Harold T. Johnson Democrat others 6.5% | 39.9% | R+13.8 |
| 1978 | Harold T. Johnson Democrat | 59.4% | James E. Taylor Republican | 40.6% | D+18.7 |
| 1976 | Harold T. (Bizz) Johnson Democrat | 74.0% | James E. Taylor Republican | 26.1% | D+47.9 |
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-1 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).
PollCheck US. Data through November 5, 2026. Photo credits