California 10th Congressional District
Congressional District 10
Covers parts of Contra Costa County and Alameda County.
Who Holds This Seat
Running in 2026
Democrat · U.S. Representative
- Ballot
- On the 2026 ballot
- Last Change
- Profile updated · Sep 24
- Raised
- $576,640cycle to date through Jun 30
- Cash on Hand
- $586,497cycle to date through Jun 30
View on FEC.govFEC, cycle to date through Jun 30, 2026
Republican
- Ballot
- On the 2026 ballot
- Last Change
- New finance report · Oct 5
- Raised
- Not on file
- Cash on Hand
- Not on file
View the FilingNewest filing: Miscellaneous Filing · Filed Oct 5 · FEC
On File, Not Running
The District
921 precincts · District lines: Congressional lines: enacted plan "AB 604 Congressional Plan (2025)" (AB 604, Chapter 96, Statutes of 2025; made operative by Proposition 50 (Election Rigging Response Act), approved by voters Nov 4, 2025); 2026 status: In effect for the 2026 elections under Proposition 50 (approved Nov 4, 2025); Official file https://aelc.assembly.ca.gov/system/files/2025-08/ab604.zip
Results in This District
| Contest | First | Second | Margin | Votes | Source |
|---|---|---|---|---|---|
| 2024 President515 precinctsStatewide DatabaseCertified — county Statements of Vote… | Kamala D. Harris (D)261,571 · 65.4% | Donald J. Trump (R)124,854 · 31.2% | D+34.2 | 399,681 | Statewide DatabaseCertified — county Statements of Vote… |
| 2024 US Senate - 2515 precinctsStatewide DatabaseCertified — county Statements of Vote… | Adam B. Schiff (D)249,731 · 64.8% | Steve Garvey (R)135,672 · 35.2% | D+29.6 | 385,403 | Statewide DatabaseCertified — county Statements of Vote… |
| 2024 US Senate - 3 Partial/Unexpired Term515 precinctsStatewide DatabaseCertified — county Statements of Vote… | Adam B. Schiff (D)240,079 · 64.9% | Steve Garvey (R)129,660 · 35.1% | D+29.9 | 369,739 | Statewide DatabaseCertified — county Statements of Vote… |
| 2022 US Senate - 1827 precinctsStatewide DatabaseCertified — county Statements of Vote… | Alex Padilla (D)202,755 · 66.5% | Mark P. Meuser (R)102,010 · 33.5% | D+33.1 | 304,765 | Statewide DatabaseCertified — county Statements of Vote… |
| 2022 US Senate - 3 Partial/Unexpired Term827 precinctsStatewide DatabaseCertified — county Statements of Vote… | Alex Padilla (D)200,541 · 66.4% | Mark P. Meuser (R)101,490 · 33.6% | D+32.8 | 302,031 | Statewide DatabaseCertified — county Statements of Vote… |
| 2022 Governor827 precinctsStatewide DatabaseCertified — county Statements of Vote… | Gavin Newsom (D)201,147 · 65.1% | Brian Dahle (R)107,992 · 34.9% | D+30.1 | 309,139 | Statewide DatabaseCertified — county Statements of Vote… |
| 2020 President688 precinctsStatewide DatabaseCertified — county Statements of Vote… | Joseph R. Biden (D)329,700 · 69.3% | Donald J. Trump (R)135,893 · 28.6% | D+40.7 | 475,717 | Statewide DatabaseCertified — county Statements of Vote… |
Totals add up the certified precinct results for the precincts inside today's district lines. A precinct split by the district line counts in full, or only in the district holding most of its voters where the linkage assigns it to one, and votes a county reported only countywide (some counties' absentee and early votes) are left out, so totals can differ from an official canvass.
Past Results
United States Representative District 10
2024 General Election (precinct detail) · Nov 5, 2024| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mark DeSaulnierDemocratic | Democratic | 242,325 | 66.5% |
| Katherine PiccininiRepublican | Republican | 122,219 | 33.5% |
Certified — county Statements of Vote as compiled by the Statewide Database; contest totals compared with the California Secretary of State certified Statement of Vote · Statewide Database
United States Representative District 10
2022 General Election (precinct detail) · Nov 8, 2022| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mark DeSaulnierDemocratic | Democratic | 198,415 | 78.9% |
| Michael Ernest KerrGreen | Green | 52,965 | 21.1% |
Certified — county Statements of Vote as compiled by the Statewide Database; contest totals compared with the California Secretary of State certified Statement of Vote · Statewide Database
United States Representative District 10
2020 General Election (precinct detail) · Nov 3, 2020| Candidate | Party | Votes | Share |
|---|---|---|---|
| Josh HarderDemocratic | Democratic | 166,865 | 55.2% |
| Ted HowzeRepublican | Republican | 135,629 | 44.8% |
Certified — county Statements of Vote as compiled by the Statewide Database; contest totals compared with the California Secretary of State certified Statement of Vote · Statewide Database