Contra Costa County, California
Latest: 2024
Safe Democratic — shifted 7.4pp toward Republicans in 2024 — 40 presidential elections on record
Race & ancestry
| Group | % |
|---|---|
▶White (Non-Hispanic)(13) | 38.1% |
▶Hispanic / Latino(20) | 27.6% |
▶Black / African American(13) | 8.3% |
▶Asian(6) | 18.8% |
▶Middle Eastern / North African(11) | 1.7% |
▶Native American / Alaska Native(3) | 1.0% |
▶Native Hawaiian / Pacific Islander(5) | 0.5% |
Multiracial / Other | 5.7% |
Religious adherence
| Tradition | % Pop | % Adherents |
|---|---|---|
| Catholic | 26.8% | 64.5% |
| Other | 6.0% | 14.5% |
| Evangelical Protestant | 5.4% | 13.0% |
| LDS (Mormon) | 2.2% | 5.2% |
| Mainline Protestant | 1.7% | 4.0% |
| Black Protestant | 1.4% | 3.4% |
| Orthodox Christian | 0.2% | 0.5% |
| Non-religious | 58.4% | — |
Presidential results
| Year | Result |
|---|---|
| 2024 | Harris+38.0 |
| 2020 | Biden+45.3 |
| 2016 | Clinton+43.0 |
| 2012 | Obama+35.1 |
| 2008 | Obama+37.6 |
| 2004 | Kerry+25.8 |
| 2000 | Gore+21.8 |
| 1996 | Clinton+20.6 |
| 1992 | Clinton+21.4 |
Contra Costa, California is a county that has a population of 1,165,012. In the 2024 presidential election, it voted Democratic with a margin of D+38.0. Akashic Edge tracks 40 presidential elections here, dating back to 1868.
| Year | Dem % | Rep % | Margin | Swing |
|---|---|---|---|---|
| 2024 | 67.3% | 29.4% | D+38.0 | R+7.4 |
| 2020 | 71.6% | 26.3% | D+45.3 | D+2.4 |
| 2016 | 67.5% | 24.5% | D+43.0 | D+7.9 |
| 2012 | 66.2% | 31.1% | D+35.1 | R+2.5 |
| 2008 | 67.7% | 30.1% | D+37.6 | D+11.8 |
| 2004 | 62.3% | 36.5% | D+25.8 | D+4.1 |
| 2000 | 58.8% | 37.1% | D+21.8 | D+1.2 |
| 1996 | 55.7% | 35.2% | D+20.6 | R+0.8 |
| 1992 | 50.9% | 29.5% | D+21.4 | D+18.2 |
| 1988 | 51.1% | 47.9% | D+3.3 | D+13.2 |
| 1984 | 44.6% | 54.5% | R+9.9 | D+2.9 |
| 1980 | 37.3% | 50.1% | R+12.8 | R+11.7 |
| 1976 | 48.2% | 49.3% | R+1.1 | D+9.5 |
| 1972 | 43.5% | 54.1% | R+10.6 | R+12.6 |
| 1968 | 46.4% | 44.5% | D+1.9 | R+25.1 |
| 1964 | 63.4% | 36.5% | D+27.0 | D+20.9 |
| 1960 | 52.9% | 46.8% | D+6.0 | D+8.2 |
| 1956 | 48.8% | 51.0% | R+2.2 | R+3.4 |
| 1952 | 50.3% | 49.1% | D+1.2 | R+13.4 |
| 1948 | 55.0% | 40.4% | D+14.6 | — |
What defines Contra Costa?
It has a diverse, highly educated electorate — the core of the modern Democratic coalition.
County in State Context
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Explore this county's political evolution with the Historian
Key Insights
High-confidence patterns distilled from this geography's election history.
- Has voted Democratic in the last 5 presidential elections
- Latest election (2024) was a Democratic landslide with a 38.0% margin
- College attainment is 45% — 12pp above the national average. Similar education levels correlate with Democratic lean nationally
Located In
Contra Costa sits inside these higher-level geographies.