California 15th Congressional District
Akashic| Year | Margin (D minus R) |
|---|---|
| 2008 | +49.9% |
| 2012 | +52.4% |
| 2016 | +59.4% |
| 2020 | +57.3% |
| 2024 | +47.9% |
Federal officeholders only. State and local officeholders are planned for the next data pass.
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.
| Year | District | Won | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | 15 | D | 73.1%211,648 | 26.9%77,896 | 289,544 |
| 2022 | 15 | D | 100.0%194,874 | 0.0%0 | 194,874 |
| 2020 | 15 | D | 70.9%242,991 | 29.1%99,710 | 342,701 |
| 2018 | 15 | D | 73.0%177,989 | 27.0%65,940 | 243,929 |
| 2016 | 15 | D | 73.8%198,578 | 26.2%70,619 | 269,197 |
| 2014 | 15 | D | 69.8%99,756 | 30.2%43,150 | 142,906 |
| 2012 | 15 | D | 100.0%231,034 | 0.0%0 | 231,034 |
| 2010 | 15 | D | 67.6%126,147 | 32.4%60,468 | 186,615 |
| 2008 | 15 | D | 71.7%170,977 | 23.3%55,489 | 238,589 |
| 2006 | 15 | D | 72.3%115,532 | 27.7%44,186 | 159,718 |
| 2004 | 15 | D | 72.0%154,385 | 28.0%59,953 | 214,338 |
| 2002 | 15 | D | 65.8%87,482 | 31.0%41,251 | 133,022 |
| 2000 | 15 | D | 54.3%128,545 | 42.2%99,866 | 236,822 |
| 1998 | 15 | R | 37.9%70,059 | 60.5%111,876 | 184,778 |
| 1996 | 15 | R | 34.8%79,048 | 58.5%132,737 | 226,868 |
| 1994 | 15 | D | 59.9%119,921 | 40.1%80,266 | 200,204 |
| 1992 | 15 | D | 63.5%168,617 | 31.2%82,875 | 265,370 |
| 1990 | 15 | D | 66.2%97,147 | 33.8%49,634 | 146,781 |
| 1988 | 15 | D | 69.8%118,710 | 28.2%47,957 | 170,193 |
| 1986 | 15 | D | 71.0%93,600 | 27.2%35,793 | 131,775 |
| 1984 | 15 | D | 65.5%109,590 | 32.7%54,730 | 167,406 |
| 1982 | 15 | D | 63.7%86,022 | 34.0%45,948 | 135,043 |
| 1980 | 15 | D | 71.8%108,072 | 25.2%37,895 | 150,491 |
| 1978 | 15 | D | 60.1%75,212 | 39.9%49,914 | 125,126 |
| 1976 | 15 | D | 72.2%92,735 | 27.8%35,700 | 128,435 |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | D | 58.9%9,036,252 | 41.1%6,312,594 | 15,348,846 |
| 2022 | D | 61.1%6,621,621 | 38.9%4,222,029 | 10,843,650 |
| 2018 | D | 100.0%11,113,364 | 0.0%0 | 11,113,364 |
| 2016 | D | 100.0%12,244,170 | 0.0%0 | 12,244,170 |
| 2012 | D | 62.5%7,864,624 | 37.5%4,713,887 | 12,578,511 |
| 2010 | D | 52.2%5,218,441 | 42.2%4,217,366 | 10,000,093 |
| 2006 | D | 59.4%5,076,289 | 35.0%2,990,822 | 8,541,150 |
| 2004 | D | 57.7%6,955,728 | 37.8%4,555,922 | 12,053,242 |
| 2000 | D | 55.8%5,932,522 | 36.6%3,886,853 | 10,623,608 |
| 1998 | D | 53.1%4,410,056 | 43.0%3,575,078 | 8,311,905 |
| 1994 | D | 46.7%3,979,152 | 44.8%3,817,025 | 8,513,916 |
| 1992 | D | 47.9%5,173,467 | 43.0%4,644,182 | 10,799,436 |
| 1988 | R | 44.0%4,287,253 | 52.8%5,143,409 | 9,743,547 |
| 1986 | D | 49.3%3,646,672 | 47.9%3,541,804 | 7,398,462 |
| 1982 | R | 44.8%3,494,968 | 51.5%4,022,565 | 7,805,450 |
| 1980 | D | 56.5%4,704,098 | 37.1%3,091,671 | 8,324,012 |
| 1976 | R | 46.9%3,502,862 | 50.2%3,748,973 | 7,470,586 |
CA-15 covers a dense East Bay corridor with a heavily diverse, urban electorate that has delivered some of the widest presidential margins in the state, exceeding 35 points in 2024.
Across the recorded series it reached a Democratic high of 59.4 points in 2016. Between 2020 and 2024 the district moved 9.5 points toward the Republican candidate; the 2024 margin was 47.9 points.
A population of 757,677, a 32% non-Hispanic-white share, and a median household income of $149,734 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 11 and Congressional District 14.
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.
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 15th Congressional District. Akashic. https://akashic.app/cd/0615/. Accessed May 20, 2026. License: CC BY 4.0.