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California's 31st Congressional District
The current officeholder, the 2024 result, and a precinct-level model you can run yourself — built from how California actually voted.
Model California's 31st Congressional District →
Current officeholder
Gilbert Ray Cisneros, Jr. Democratic
2024 result
Democratic D+19.5
2024 votes cast
247,754
Office
U.S. House
Who lives in this district
This district is home to about 741,057 people, median age 38.9, median household income $90,026.
Population
741,057
Median age
38.9
Median household income
$90,026
Bachelor's degree or higher
25%
Race & ethnicity: White 14.1% · Black 2.7% · Hispanic 60.8% · Asian 19.9%
Source: U.S. Census Bureau, 2019–2023 American Community Survey (5-year).
Precinct results — 2024 general
516 precincts reported in California's 31st Congressional District's 2024 general election. The twenty largest:
| Precinct | Winner | Margin | Votes |
|---|---|---|---|
| 06037-6000003AA | Republican | R+2.6 | 2,645 |
| 06037-3400011BA | Democratic | D+17.4 | 2,479 |
| 06037-3400050AA | Republican | R+10.0 | 2,364 |
| 06037-3400004AA | Democratic | D+14.9 | 2,314 |
| 06037-4400037AA | Democratic | D+43.4 | 2,252 |
| 06037-7700155BA | Democratic | D+23.5 | 2,194 |
| 06037-7700073AA | Democratic | D+37.1 | 2,071 |
| 06037-0550030AA | Democratic | D+26.5 | 2,067 |
| 06037-2600106AA | Democratic | D+18.6 | 2,055 |
| 06037-3400010AA | Republican | R+5.2 | 2,010 |
| 06037-4400061AA | Democratic | D+49.1 | 1,848 |
| 06037-4400001AA | Democratic | D+41.0 | 1,827 |
| 06037-6000011AA | Democratic | D+9.7 | 1,812 |
| 06037-2600040AA | Democratic | D+11.3 | 1,791 |
| 06037-7700040AA | Democratic | D+30.0 | 1,755 |
| 06037-7700024BA | Democratic | D+21.4 | 1,750 |
| 06037-5500012AA | Democratic | D+36.2 | 1,699 |
| 06037-1500036AA | Democratic | D+19.9 | 1,620 |
| 06037-0550073AA | Democratic | D+32.4 | 1,610 |
| 06037-7700115AA | Democratic | D+27.8 | 1,565 |
All 516 precincts are modelable — open the race in the simulator and drill to precinct grain.
Find your district
Enter a ZIP code or a district (e.g. NC-4) to find your U.S. House district and who represents it.
Model California's 31st Congressional District in five steps
- Set the candidates. Name the contenders for the California's 31st Congressional District (or keep the generic Democrat / Republican defaults). The map starts from the canonical mixed-grain 2024 presidential baseline.
- Apply a swing. Move vote share statewide, or by demographic cohort, with a slider. The map and the running tally recompute instantly.
- Model turnout. Mobilize or depress turnout for any group — turnout and persuasion are modeled separately, the way a real campaign thinks about them.
- Explore local geography. Zoom from the state through counties to the finest supported reporting grain and adjust the places available in the model.
- Roll up & share. Roll the result up to chamber control, then share the exact versioned scenario.
Open California's 31st Congressional District in the simulator →