California 3rd State Senate District
Akashic| Kamala Harris ✓Democratic | 62.0% | 284,083 |
|---|---|---|
| Donald TrumpRepublican | 35.0% | 160,363 |
| Robert F. Kennedy Jr.American Independent | 3.1% | 14,029 |
County-level results (7 counties) — table
| County | Winner | Margin |
|---|---|---|
| Contra Costa County, CA | Democratic | D+37.9 |
| Lake County, CA | Republican | R+1.4 |
| Napa County, CA | Democratic | D+34.9 |
| Sacramento County, CA | Democratic | D+19.7 |
| Solano County, CA | Democratic | D+22.9 |
| Sonoma County, CA | Democratic | D+46.2 |
| Yolo County, CA | Democratic | D+36.2 |
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| D | 62.0%Harris284,083 | 35.0%Trump160,363 | 3.1%Kennedy14,029 | 458,475 | ||
| D | 65.5%Biden322,351 | 32.1%Trump158,186 | 2.3%Jorgensen11,509 | 492,046 | ||
| D | 63.2%Clinton250,283 | 30.5%Trump120,729 | 6.3%Johnson25,109 | 396,121 | ||
| D | 65.2%Obama232,924 | 34.8%Romney124,300 | 0.0% | 357,224 | ||
| D | 65.6%Obama245,292 | 34.1%McCain127,380 | 0.4%Nader1,417 | 374,089 |
| Year | Margin (D minus R) |
|---|---|
| 2008 | +31.5% |
| 2012 | +30.4% |
| 2016 | +32.7% |
| 2020 | +33.4% |
| 2024 | +27.0% |
State legislative officeholder from OpenStates nightly current-legislator data.
With a 2024 presidential margin of D+32, this district anchors the Democratic coastal wing of the California Senate. Its seven-figure population makes it one of the larger state upper-chamber constituencies in the nation.
Across the recorded series it reached a Democratic high of 33.4 points in 2020. Between 2020 and 2024 the district moved 6.4 points toward the Republican candidate; the 2024 margin was 27.0 points.
A population of 1,032,082, a 37% non-Hispanic-white share, and a median household income of $104,043 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 8 and State Senate District 39.
The state-senate 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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
California 3rd State Senate District. Akashic. https://akashic.app/sld-upper/06003/. Accessed May 20, 2026. License: CC BY 4.0.