House districts / California
California's 40th congressional district
CA-40. Redrawn for 2026: the November 2026 election is on new lines. The outline shows the 2024 district with the same number.
Fundraising
- Young Kim Ras of Oct 14, 2026Raised $10.1mSpent $11.0m · Cash $911k
- Ken Calvert Ras of Oct 14, 2026Raised $7.1mSpent $6.3m · Cash $980k
10 other 2026 candidates filed reports (primary candidates). 3 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 42.6% | Trump 54.5% | 2.9% | R+11.9 | R+2.3 |
| 2020 | Biden 45.2% | Trump 52.9% | 1.9% | R+7.6 | D+1.9 |
| 2016 | Clinton 40.5% | Trump 54.2% | 5.4% | R+13.7 | R+4.3 |
Who lives here
| Measure | This district | US |
|---|---|---|
| People | ||
| Population | 758,355 | |
| Adults (18+) | 581,307 | |
| Citizens, % of adults* | 92.8% | 92.1% |
| Age, % of adults | ||
| 18 to 29* | 17.9% | 20.3% |
| 30 to 44* | 26.5% | 25.9% |
| 45 to 64* | 34.7% | 31.8% |
| 65 and over* | 20.9% | 22.0% |
| Race and Hispanic origin, % of residents | ||
| White | 47.3% | 57.8% |
| Black | 4.0% | 12.1% |
| Hispanic | 32.1% | 18.7% |
| Asian | 10.5% | 5.9% |
| Other or more than one | 6.0% | 5.5% |
| Education and income | ||
| Bachelor's degree or higher, % of 25+* | 37.5% | 35.7% |
| Median household income* | $122,830 | $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 | Young Kim Republican | 55.3% | Joe Kerr Democrat | 44.7% | R+10.5 |
| 2022 | Young Kim Republican | 56.8% | Asif Mahmood Democrat | 43.2% | R+13.7 |
| Earlier lines, elections 2012-2020 post-census redistricting | |||||
| 2020 | Lucille Roybal-Allard Democrat | 72.7% | C. Antonio Delgado Republican | 27.3% | D+45.5 |
| 2018 | Lucille Roybal-Allard Democrat | 77.3% | Rodolfo Cortes Barragan Green | 22.6% | D+54.7 |
| 2016 | Lucille Roybal-Allard Democrat | 71.4% | Roman Gabriel Gonzalez Other | 28.6% | D+42.7 |
| 2014 | Lucille Roybal-Allard Democrat | 61.2% | David Sanchez Democrat | 38.8% | D+22.4 |
| 2012 | Lucille Roybal-Allard Democrat | 58.9% | David Sanchez Democrat | 41.1% | D+17.8 |
| Earlier lines, elections 2002-2010 seat count changed from 52 to 53 after the census | |||||
| 2010 | Edward R. Royce Republican | 66.8% | Christina Avalos Democrat | 33.2% | R+33.6 |
| 2008 | Edward R. Royce Republican | 62.5% | Christina Avalos Democrat | 37.5% | R+25.1 |
| 2006 | Edward R. Royce Republican | 66.8% | Florice Orea Hoffman Democrat others 2.6% | 30.7% | R+36.1 |
| 2004 | Edward R. Royce Republican | 67.9% | J. Tilman Williams Democrat | 32.1% | R+35.9 |
| 2002 | Edward R. Royce Republican | 67.6% | Christina Avalos Democrat others 2.9% | 29.5% | R+38.2 |
| Earlier lines, elections 1992-2000 seat count changed from 45 to 52 after the census | |||||
| 2000 | Jerry Lewis Republican | 79.9% | Frank N. Schmit Natural law others 10.0% | 10.1% | R+69.8 |
| 1998 | Jerry Lewis Republican | 64.9% | Robert 'Bob' Conaway Democrat others 3.2% | 31.9% | R+33.0 |
| 1996 | Jerry Lewis Republican | 64.9% | Robert "Bob" Conaway Democrat others 6.1% | 29.0% | R+35.9 |
| 1994 | Jerry Lewis Republican | 70.7% | Donald "Don" M. Rusk Democrat | 29.3% | R+41.4 |
| 1992 | Jerry Lewis Republican | 63.1% | Donald M. "Don" Rusk Democrat others 5.8% | 31.1% | R+32.0 |
| Earlier lines, elections 1982-1990 seat count changed from 43 to 45 after the census | |||||
| 1990 | C. Christopher Cox Republican | 67.6% | Eugene C. Gratz Democrat | 32.4% | R+35.3 |
| 1988 | Christopher Cox Republican | 67.0% | Lida Lenney Democrat others 3.1% | 29.9% | R+37.2 |
| 1986 | Robert E. Badham Republican | 59.8% | Bruce W. Summer Democrat others 2.5% | 37.7% | R+22.0 |
| 1984 | Robert E. Badham Republican | 64.4% | Carol Ann Bradford Democrat others 1.6% | 34.0% | R+30.4 |
| 1982 | Robert E. Badham Republican | 71.5% | Paul Haseman Democrat others 2.4% | 26.1% | R+45.5 |
| Earlier lines, elections 1976-1980 | |||||
| 1980 | Robert E. Badham Republican | 70.2% | Michael F. Dow Democrat others 8.0% | 21.8% | R+48.4 |
| 1978 | Robert E. Badham Republican | 66.0% | Jim McGuy Democrat | 34.0% | R+31.9 |
| 1976 | Robert E. Badham Republican | 59.2% | Vivian Hall Democrat | 40.8% | R+18.5 |
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-40 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