- Lead
- 234,767
- Total
- 317,477
- vs nation
- D+75.4
California 12th Congressional District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 296,992
- Total
- 367,864
- vs nation
- D+76.3
- Lead
- 261,686
- Total
- 332,260
- vs nation
- D+77.7
- Lead
- 237,768
- Total
- 294,747
- vs nation
- D+76.8
- Lead
- 245,440
- Total
- 306,125
- vs nation
- D+72.9
- Lead
- 206,395
- Total
- 268,666
- vs nation
- D+79.3
- Lead
- 164,305
- Total
- 233,510
- vs nation
- D+69.8
- Lead
- 142,970
- Total
- 218,484
- vs nation
- D+58.2
Key facts
- 2024 presidential margin
- D+73.9MIT Election Lab
- Population
- 758,3752024 5-year
- Population density
- 5,367 / sq mi2024 5-year · TIGER/Line
- Land area
- 141 sq miTIGER/Line
- Median household income
- $108,6482024 5-year
- White (non-Hispanic)
- 32.9%2024 5-year
- Black
- 15.2%2024 5-year
- Hispanic / Latino
- 23.6%2024 5-year
- Peak Democratic margin
- D+80.7 in 2020MIT Election Lab
- Peak Republican margin
- R+30.9 in 1924MIT Election Lab
- Most similar
- Congressional District 10, NY · twin score 96.0
presidential history
Party record book
California 12th Congressional District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Joe Biden2020
89.3%
328,617 votes · D+80.7 · modeled estimate
Runner-up · Barack Obama, 2008 · 88.9%
Republican
Warren G. Harding1920
48.2%
16,541 votes · R+13.4 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · 48.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
328,617votes
89.3% of the vote · D+80.7 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 286,380 votes
Republican
Richard Nixon1972
44,434votes
22.9% of the vote · D+51.5 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 42,480 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
John Kerry2004
+79.3pts D vs U.S.
Place D+76.8 · U.S. R+2.5 · modeled estimate
Runner-up · Hillary Clinton, 2016 · +77.7 pts
Republican
Calvin Coolidge1924
+5.8pts R vs U.S.
Place R+30.9 · U.S. R+25.2 · a third-party candidate carried the Place · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · −1.6 pts
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Anchored in San Francisco, CA-12 posts presidential margins rarely seen outside urban cores—Biden and Harris each carried it by more than 60 points—making it among the least competitive seats in Congress.
Across the recorded series it reached a Democratic high of 80.7 points in 2020 and a Republican high of 30.9 points in 1924. Between 2020 and 2024 the district moved 6.8 points toward the Republican candidate; the 2024 margin was 73.9 points.
A population of 758,375, a 33% non-Hispanic-white share, and a median household income of $108,648 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 10 and Congressional District 11.
The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
California 12th Congressional District. Akashic. https://akashic.app/cd/0612/. Accessed May 20, 2026. License: CC BY 4.0.