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California's 4th 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 4th Congressional District →
Current officeholder
Mike Thompson Democratic
2024 result
Democratic D+33.0
2024 votes cast
342,331
Office
U.S. House
Who lives in this district
This district is home to about 763,128 people, median age 39.3, median household income $95,443.
Population
763,128
Median age
39.3
Median household income
$95,443
Bachelor's degree or higher
35.7%
Race & ethnicity: White 51.2% · Black 3% · Hispanic 32% · Asian 8.3%
Source: U.S. Census Bureau, 2019–2023 American Community Survey (5-year).
Precinct results — 2024 general
959 precincts reported in California's 4th Congressional District's 2024 general election. The twenty largest:
| Precinct | Winner | Margin | Votes |
|---|---|---|---|
| 06113-12025A | Democratic | D+68.2 | 5,114 |
| 06113-12037A | Democratic | D+13.2 | 4,645 |
| 06113-12023A | Democratic | D+63.9 | 4,306 |
| 06113-12038A | Democratic | D+3.5 | 3,783 |
| 06113-12039A | Democratic | D+36.7 | 3,769 |
| 06113-12042A | Democratic | D+25.9 | 3,748 |
| 06113-12054A | Democratic | D+69.7 | 3,641 |
| 06113-12057A | Democratic | D+23.6 | 3,489 |
| 06113-12026A | Democratic | D+61.4 | 3,167 |
| 06113-12053A | Democratic | D+67.5 | 2,958 |
| 06113-12027A | Democratic | D+15.2 | 2,939 |
| 06095-54025 | Democratic | D+36.8 | 2,394 |
| 06095-46270 | Democratic | D+13.9 | 2,308 |
| 06095-56130 | Democratic | D+11.7 | 2,295 |
| 06113-12048A | Republican | R+10.5 | 2,183 |
| 06113-12021A | Democratic | D+77.6 | 2,118 |
| 06095-56020 | Democratic | D+3.7 | 2,054 |
| 06095-56190 | Republican | R+0.3 | 2,045 |
| 06113-12024A | Democratic | D+75.5 | 2,033 |
| 06095-46320 | Democratic | D+3.1 | 1,999 |
All 959 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 4th Congressional District in five steps
- Set the candidates. Name the contenders for the California's 4th 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 4th Congressional District in the simulator →