House districts / California
California's 18th congressional district
CA-18. Redrawn for 2026: the November 2026 election is on new lines. The outline shows the 2024 district with the same number.
Fundraising
- Zoe Lofgren Das of Oct 14, 2026Raised $2.0mSpent $1.6m · Cash $602k
- Shane Lewis Ras of Oct 14, 2026Raised $115kSpent $111k · Cash $4k
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 62.5% | Trump 34.4% | 3.1% | D+28.1 | D+29.5 |
| 2020 | Biden 70.3% | Trump 27.6% | 2.2% | D+42.7 | D+44.0 |
| 2016 | Clinton 70.7% | Trump 23.5% | 5.8% | D+47.1 | D+48.8 |
Who lives here
| Measure | This district | US |
|---|---|---|
| People | ||
| Population | 770,826 | |
| Adults (18+) | 574,921 | |
| Citizens, % of adults* | 73.7% | 92.1% |
| Age, % of adults | ||
| 18 to 29* | 23.6% | 20.3% |
| 30 to 44* | 28.5% | 25.9% |
| 45 to 64* | 31.3% | 31.8% |
| 65 and over* | 16.6% | 22.0% |
| Race and Hispanic origin, % of residents | ||
| White | 19.1% | 57.8% |
| Black | 1.8% | 12.1% |
| Hispanic | 65.6% | 18.7% |
| Asian | 10.1% | 5.9% |
| Other or more than one | 3.5% | 5.5% |
| Education and income | ||
| Bachelor's degree or higher, % of 25+* | 23.7% | 35.7% |
| Median household income* | $102,343 | $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 | Zoe Lofgren Democrat | 64.6% | Peter D. Hernandez Republican | 35.4% | D+29.3 |
| 2022 | Zoe Lofgren Democrat | 65.8% | Peter Hernandez Republican | 34.1% | D+31.7 |
| Earlier lines, elections 2012-2020 post-census redistricting | |||||
| 2020 | Anna G. Eshoo Democrat | 63.2% | Rishi Kumar Democrat | 36.8% | D+26.3 |
| 2018 | Anna G. Eshoo Democrat | 74.5% | Christine Russell Republican | 25.5% | D+49.0 |
| 2016 | Anna G. Eshoo Democrat | 71.2% | Richard B. Fox Republican | 28.9% | D+42.3 |
| 2014 | Anna G. Eshoo Democrat | 67.8% | Richard B. Fox Republican | 32.2% | D+35.5 |
| 2012 | Anna G. Eshoo Democrat | 70.5% | Dave Chapman Republican | 29.5% | D+41.0 |
| Earlier lines, elections 2002-2010 seat count changed from 52 to 53 after the census | |||||
| 2010 | Dennis A. Cardoza Democrat | 58.5% | Michael Clare Berryhill, Sr. Republican | 41.5% | D+17.0 |
| 2008 | Dennis A. Cardoza Democrat | 100.0% | D+100.0 | ||
| 2006 | Dennis A. Cardoza Democrat | 65.5% | John A. Kanno Republican | 34.5% | D+31.0 |
| 2004 | Dennis A. Cardoza Democrat | 67.5% | Charles F. Pringle, Sr. Republican | 32.5% | D+35.0 |
| 2002 | Dennis A. Cardoza Democrat | 51.3% | Dick Monteith Republican others 5.4% | 43.4% | D+7.9 |
| Earlier lines, elections 1992-2000 seat count changed from 45 to 52 after the census | |||||
| 2000 | Gary A. Condit Democrat | 67.1% | Steve R. Wilson Republican others 1.6% | 31.3% | D+35.8 |
| 1998 | Gary A. Condit Democrat | 86.8% | Linda M. Degroat Libertarian | 13.2% | D+73.6 |
| 1996 | Gary A. Condit Democrat | 65.7% | Bill Conrad Republican others 2.5% | 31.8% | D+33.9 |
| 1994 | Gary A. Condit Democrat | 65.5% | Tom Carter Republican others 2.8% | 31.7% | D+33.8 |
| 1992 | Gary A. Condit Democrat | 84.7% | Kim R. Almstrom Libertarian | 15.3% | D+69.3 |
| Earlier lines, elections 1982-1990 seat count changed from 43 to 45 after the census | |||||
| 1990 | Richard H. Lehman Democrat | 100.0% | D+100.0 | ||
| 1988 | Richard H. Lehman Democrat | 69.9% | David A. Linn Republican | 30.1% | D+39.9 |
| 1986 | Richard H. Lehman Democrat | 71.3% | David C. Crevelt Republican | 28.7% | D+42.5 |
| 1984 | Richard H. Lehman Democrat | 67.3% | Dale L. Ewen Republican | 32.7% | D+34.6 |
| 1982 | Richard Lehman Democrat | 59.5% | Adrian C. Fonde Republican others 2.2% | 38.3% | D+21.2 |
| Earlier lines, elections 1976-1980 | |||||
| 1980 | William M. Thomas Republican | 71.0% | Mary "Pat" Timmermans Democrat | 29.0% | R+42.1 |
| 1978 | William M. Thomas Republican | 59.3% | Bob Sogge Democrat | 40.7% | R+18.5 |
| 1976 | William M. Ketchum Republican | 64.2% | Dean Close Democrat | 35.8% | R+28.4 |
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-18 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