California 45th Congressional District
Akashic| Year | Margin (D minus R) |
|---|---|
| 2008 | +1.8% |
| 2012 | +8.7% |
| 2016 | +21.2% |
| 2020 | +10.5% |
| 2024 | +3.9% |
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 | 45 | D | 50.1%158,264 | 49.9%157,611 | 315,875 |
| 2022 | 45 | R | 47.6%103,466 | 52.4%113,960 | 217,426 |
| 2020 | 45 | D | 53.5%221,843 | 46.5%193,096 | 414,939 |
| 2018 | 45 | D | 52.1%158,906 | 47.9%146,383 | 305,289 |
| 2016 | 45 | R | 41.4%129,231 | 58.6%182,618 | 311,849 |
| 2014 | 45 | R | 34.9%56,819 | 65.1%106,083 | 162,902 |
| 2012 | 45 | R | 41.5%121,814 | 58.5%171,417 | 293,231 |
| 2010 | 45 | R | 42.1%87,141 | 51.5%106,472 | 206,801 |
| 2008 | 45 | R | 41.7%111,026 | 58.3%155,166 | 266,192 |
| 2006 | 45 | R | 39.3%64,613 | 60.7%99,638 | 164,251 |
| 2004 | 45 | R | 33.4%76,967 | 66.6%153,523 | 230,490 |
| 2002 | 45 | R | 32.7%43,692 | 65.2%87,101 | 133,533 |
| 2000 | 45 | R | 32.4%71,066 | 62.1%136,275 | 219,385 |
| 1998 | 45 | R | 37.3%60,022 | 58.7%94,296 | 160,770 |
| 1996 | 45 | R | 33.2%68,312 | 61.0%125,326 | 205,522 |
| 1994 | 45 | R | 30.9%55,849 | 69.1%124,875 | 180,724 |
| 1992 | 45 | R | 39.0%88,508 | 54.5%123,731 | 227,016 |
| 1990 | 45 | R | 0.0%0 | 72.8%123,591 | 169,659 |
| 1988 | 45 | R | 24.0%54,012 | 74.0%166,451 | 224,903 |
| 1986 | 45 | R | 21.2%32,800 | 76.9%118,900 | 154,675 |
| 1984 | 45 | R | 22.9%45,325 | 75.1%149,011 | 198,307 |
| 1982 | 45 | R | 29.2%50,148 | 68.6%117,771 | 171,758 |
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-45 covers parts of Orange County once considered reliably Republican turf; the 2024 presidential margin of D+6.3 reflects a suburban realignment driven by demographic change and growing shares of college-educated and Asian American voters.
Across the recorded series it reached a Democratic high of 21.2 points in 2016. Between 2020 and 2024 the district moved 6.5 points toward the Republican candidate; the 2024 margin was 3.9 points.
A population of 757,128, a 25% non-Hispanic-white share, and a median household income of $105,124 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 28 and Congressional District 6.
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 45th Congressional District. Akashic. https://akashic.app/cd/0645/. Accessed May 20, 2026. License: CC BY 4.0.