House districts / California
California's 21st congressional district
CA-21. Redrawn for 2026: the November 2026 election is on new lines. The outline shows the 2024 district with the same number.
Fundraising
- Jim Costa Das of Oct 14, 2026Raised $1.7mSpent $1.4m · Cash $501k
- Kyle Kirkland Ras of Oct 14, 2026Raised $465kSpent $452k · Cash $13k
3 other 2026 candidates filed reports (primary candidates). 2 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 52.0% | Trump 45.3% | 2.7% | D+6.8 | D+3.8 |
| 2020 | Biden 59.5% | Trump 38.4% | 2.1% | D+21.1 | D+20.3 |
| 2016 | Clinton 58.2% | Trump 36.4% | 5.5% | D+21.8 | D+21.7 |
Who lives here
| Measure | This district | US |
|---|---|---|
| People | ||
| Population | 756,411 | |
| Adults (18+) | 537,056 | |
| Citizens, % of adults* | 84.1% | 92.1% |
| Age, % of adults | ||
| 18 to 29* | 25.0% | 20.3% |
| 30 to 44* | 29.6% | 25.9% |
| 45 to 64* | 28.5% | 31.8% |
| 65 and over* | 16.8% | 22.0% |
| Race and Hispanic origin, % of residents | ||
| White | 19.0% | 57.8% |
| Black | 4.5% | 12.1% |
| Hispanic | 63.5% | 18.7% |
| Asian | 9.5% | 5.9% |
| Other or more than one | 3.5% | 5.5% |
| Education and income | ||
| Bachelor's degree or higher, % of 25+* | 17.5% | 35.7% |
| Median household income* | $63,618 | $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 | Jim Costa Democrat | 52.6% | Michael Maher Republican | 47.4% | D+5.1 |
| 2022 | Jim Costa Democrat | 54.2% | Michael Maher Republican | 45.8% | D+8.4 |
| Earlier lines, elections 2012-2020 post-census redistricting | |||||
| 2020 | David G. Valadao Republican | 50.5% | TJ Cox Democrat | 49.5% | R+0.9 |
| 2018 | TJ Cox Democrat | 50.4% | David G. Valadao Republican | 49.6% | D+0.8 |
| 2016 | David G. Valadao Republican | 56.7% | Emilio Huerta Democrat | 43.3% | R+13.5 |
| 2014 | David G. Valadao Republican | 57.8% | Amanda Renteria Democrat | 42.2% | R+15.7 |
| 2012 | David G. Valadao Republican | 57.8% | John Hernandez Democrat | 42.2% | R+15.5 |
| Earlier lines, elections 2002-2010 seat count changed from 52 to 53 after the census | |||||
| 2010 | Devin Nunes Republican | 100.0% | R+100.0 | ||
| 2008 | Devin Nunes Republican | 68.4% | Larry Johnson Democrat | 31.6% | R+36.8 |
| 2006 | Devin Nunes Republican | 66.7% | Steven Haze Democrat others 3.3% | 29.9% | R+36.8 |
| 2004 | Devin Nunes Republican | 73.2% | Fred B. Davis Democrat | 26.8% | R+46.3 |
| 2002 | Devin Nunes Republican | 70.5% | David G. LaPere Democrat others 3.3% | 26.2% | R+44.2 |
| Earlier lines, elections 1992-2000 seat count changed from 45 to 52 after the census | |||||
| 2000 | William M. Thomas Republican | 71.6% | Pedro "Pete" Martinez, Jr. Democrat others 3.6% | 24.8% | R+46.8 |
| 1998 | William M. Thomas Republican | 78.9% | John Evans Reform | 21.1% | R+57.8 |
| 1996 | William M. Thomas Republican | 65.9% | Deborah A. Vollmer Democrat others 7.6% | 26.5% | R+39.4 |
| 1994 | William M. Thomas Republican | 68.1% | John L. Evans Democrat others 4.2% | 27.7% | R+40.4 |
| 1992 | William M. Thomas Republican | 65.2% | Deborah A. Vollmer Democrat others 0.1% | 34.7% | R+30.5 |
| Earlier lines, elections 1982-1990 seat count changed from 43 to 45 after the census | |||||
| 1990 | Elton Gallegly Republican | 58.4% | Richard D. Freiman Democrat others 7.6% | 34.0% | R+24.4 |
| 1988 | Elton Gallegly Republican | 69.1% | Donald E. Stevens Democrat others 2.1% | 28.8% | R+40.2 |
| 1986 | Elton Gallegly Republican | 68.4% | Gilbert R. Saldana Democrat others 3.4% | 28.2% | R+40.2 |
| 1984 | Bobbi Fiedler Republican | 72.3% | Charles "Charlie" Davis Democrat others 1.8% | 25.9% | R+46.4 |
| 1982 | Bobbi Fiedler Republican | 71.8% | George Henry Margolis Democrat others 4.1% | 24.1% | R+47.8 |
| Earlier lines, elections 1976-1980 | |||||
| 1980 | Bobbi Fiedler Republican | 48.7% | James C. Corman Democrat others 3.2% | 48.2% | R+0.5 |
| 1978 | James C. Corman Democrat | 59.5% | Rod Walsh Republican others 4.6% | 35.9% | D+23.6 |
| 1976 | James C. Corman Democrat | 66.5% | Erwin "Ed" Hogan Republican others 4.7% | 28.8% | D+37.7 |
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-21 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