California 1st Congressional District
Akashic| Year | Margin (D minus R) |
|---|---|
| 2008 | +19.6% |
| 2012 | +16.1% |
| 2016 | +13.7% |
| 2020 | +17.8% |
| 2024 | +12.2% |
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 | 1 | R | 34.7%110,636 | 65.3%208,592 | 319,228 |
| 2022 | 1 | R | 37.9%93,386 | 62.1%152,839 | 246,225 |
| 2020 | 1 | R | 43.0%154,073 | 57.0%204,190 | 358,263 |
| 2018 | 1 | R | 45.1%131,548 | 54.9%160,046 | 291,594 |
| 2016 | 1 | R | 40.9%128,588 | 59.1%185,448 | 314,036 |
| 2014 | 1 | R | 39.0%84,320 | 61.0%132,052 | 216,372 |
| 2012 | 1 | R | 42.6%125,386 | 57.4%168,827 | 294,213 |
| 2010 | 1 | D | 62.8%147,307 | 31.0%72,803 | 234,592 |
| 2008 | 1 | D | 68.1%197,812 | 23.4%67,853 | 290,472 |
| 2006 | 1 | D | 66.2%144,409 | 29.0%63,194 | 218,044 |
| 2004 | 1 | D | 66.9%189,366 | 28.3%79,970 | 282,971 |
| 2002 | 1 | D | 64.1%118,669 | 32.4%60,013 | 185,216 |
| 2000 | 1 | D | 65.0%155,638 | 28.0%66,987 | 239,335 |
| 1998 | 1 | D | 61.8%121,713 | 32.9%64,692 | 196,805 |
| 1996 | 1 | R | 43.5%96,522 | 49.6%110,243 | 222,119 |
| 1994 | 1 | R | 46.7%93,717 | 53.3%106,870 | 200,673 |
| 1992 | 1 | D | 47.6%119,676 | 45.1%113,266 | 251,206 |
| 1990 | 1 | R | 41.9%96,468 | 43.3%99,782 | 230,261 |
| 1988 | 1 | D | 62.9%159,815 | 28.4%72,189 | 254,154 |
| 1986 | 1 | D | 67.5%138,174 | 26.6%54,436 | 204,759 |
| 1984 | 1 | D | 62.3%157,037 | 37.7%95,186 | 252,223 |
| 1982 | 1 | D | 49.8%107,749 | 47.2%102,043 | 216,166 |
| 1980 | 1 | R | 39.9%107,682 | 53.7%145,098 | 270,199 |
| 1978 | 1 | D | 59.4%125,122 | 40.6%85,690 | 210,812 |
| 1976 | 1 | D | 73.9%160,477 | 26.1%56,539 | 217,016 |
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 |
Spanning rugged terrain from the Oregon border to the Sierra Nevada foothills, CA-01 has delivered double-digit Republican presidential margins for over a decade, driven by a predominantly rural, non-Hispanic white electorate concentrated in small timber and agricultural communities.
Across the recorded series it reached a Democratic high of 19.6 points in 2008. Between 2020 and 2024 the district moved 5.6 points toward the Republican candidate; the 2024 margin was 12.2 points.
A population of 765,064, a 65% non-Hispanic-white share, and a median household income of $86,090 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 2 and Congressional District 4.
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 1st Congressional District. Akashic. https://akashic.app/cd/0601/. Accessed May 20, 2026. License: CC BY 4.0.