California Assembly District 21
Assembly District 21
Covers part of San Mateo County.
Who Holds This Seat
Running in 2026
Democrat · Assemblymember
- Ballot
- On the 2026 ballot
- Last Change
- Profile updated · Oct 3
- Raised
- Not on file
- Cash on Hand
- Not on file
No finance filing on record.
Republican
- Ballot
- On the 2026 ballot
- Last Change
- Profile updated · Oct 3
- Raised
- Not on file
- Cash on Hand
- Not on file
No finance filing on record.
The District
Includes Redwood City, South San Francisco (part), Brisbane, Foster City, San Mateo, Menlo Park (part), Hillsborough, Burlingame, San Carlos, San Bruno (part), Belmont, Millbrae and 5 more.
188 precincts · District lines: State legislative lines: U.S. Census Bureau TIGER/Line 2024 (SLDU/SLDL) · Precinct lines: California Statewide Database (Berkeley Law, UC Berkeley, for the California Legislature), SR precinct boundaries for the 2020 / 2022 / 2024 generals (/g22/.zip); free public resource, no formal licence
Results in This District
| Contest | First | Second | Margin | Votes | Source |
|---|---|---|---|---|---|
| 2024 President157 precinctsStatewide DatabaseCertified — county Statements of Vote… | Kamala D. Harris (D)154,402 · 73.6% | Donald J. Trump (R)48,216 · 23.0% | D+50.6 | 209,786 | Statewide DatabaseCertified — county Statements of Vote… |
| 2024 US Senate - 2157 precinctsStatewide DatabaseCertified — county Statements of Vote… | Adam B. Schiff (D)150,441 · 73.7% | Steve Garvey (R)53,810 · 26.3% | D+47.3 | 204,251 | Statewide DatabaseCertified — county Statements of Vote… |
| 2024 US Senate - 3 Partial/Unexpired Term157 precinctsStatewide DatabaseCertified — county Statements of Vote… | Adam B. Schiff (D)147,039 · 73.4% | Steve Garvey (R)53,341 · 26.6% | D+46.8 | 200,380 | Statewide DatabaseCertified — county Statements of Vote… |
| 2022 US Senate - 1163 precinctsStatewide DatabaseCertified — county Statements of Vote… | Alex Padilla (D)117,837 · 76.2% | Mark P. Meuser (R)36,726 · 23.8% | D+52.5 | 154,563 | Statewide DatabaseCertified — county Statements of Vote… |
| 2022 US Senate - 3 Partial/Unexpired Term163 precinctsStatewide DatabaseCertified — county Statements of Vote… | Alex Padilla (D)116,867 · 76.0% | Mark P. Meuser (R)36,916 · 24.0% | D+52.0 | 153,783 | Statewide DatabaseCertified — county Statements of Vote… |
| 2022 Governor163 precinctsStatewide DatabaseCertified — county Statements of Vote… | Gavin Newsom (D)116,922 · 74.8% | Brian Dahle (R)39,418 · 25.2% | D+49.6 | 156,340 | Statewide DatabaseCertified — county Statements of Vote… |
| 2020 President236 precinctsStatewide DatabaseCertified — county Statements of Vote… | Joseph R. Biden (D)186,695 · 77.9% | Donald J. Trump (R)48,173 · 20.1% | D+57.8 | 239,530 | 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
State Assembly Member District 21
2024 General Election (precinct detail) · Nov 5, 2024| Candidate | Party | Votes | Share |
|---|---|---|---|
| Diane PapanDemocratic | Democratic | 147,291 | 73.8% |
| Mark GilhamRepublican | Republican | 52,218 | 26.2% |
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
State Assembly Member District 21
2022 General Election (precinct detail) · Nov 8, 2022| Candidate | Party | Votes | Share |
|---|---|---|---|
| Diane PapanDemocratic | Democratic | 94,676 | 72.4% |
| Giselle HaleDemocratic | Democratic | 36,014 | 27.6% |
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
State Assembly Member District 21
2020 General Election (precinct detail) · Nov 3, 2020| Candidate | Party | Votes | Share |
|---|---|---|---|
| Adam GrayDemocratic | Democratic | 93,816 | 59.6% |
| Joel Gutierrez CamposRepublican | Republican | 63,514 | 40.4% |
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