California 20th Congressional District
Akashic| Year | Margin (D minus R) |
|---|---|
| 2008 | −32.3% |
| 2012 | −35.5% |
| 2016 | −32.0% |
| 2020 | −26.2% |
| 2024 | −32.2% |
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 | 20 | R | 0.0%0 | 100.0%288,788 | 288,788 |
| 2022 | 20 | R | 32.8%74,934 | 67.2%153,847 | 228,781 |
| 2020 | 20 | D | 76.8%236,896 | 23.2%71,658 | 308,554 |
| 2018 | 20 | D | 81.4%183,677 | 0.0%0 | 225,721 |
| 2016 | 20 | D | 70.8%180,980 | 29.2%74,811 | 255,791 |
| 2014 | 20 | D | 75.2%106,034 | 0.0%0 | 141,044 |
| 2012 | 20 | D | 74.1%172,996 | 25.9%60,566 | 233,562 |
| 2010 | 20 | D | 51.7%46,247 | 48.3%43,197 | 89,444 |
| 2008 | 20 | D | 74.3%93,023 | 25.7%32,118 | 125,141 |
| 2006 | 20 | D | 100.0%61,120 | 0.0%0 | 61,120 |
| 2004 | 20 | D | 53.4%61,005 | 46.6%53,231 | 114,236 |
| 2002 | 20 | D | 63.7%47,627 | 34.3%25,628 | 74,770 |
| 2000 | 20 | D | 52.3%66,235 | 45.5%57,563 | 126,534 |
| 1998 | 20 | D | 60.7%60,599 | 39.3%39,183 | 99,782 |
| 1996 | 20 | D | 56.5%65,381 | 39.1%45,276 | 115,705 |
| 1994 | 20 | D | 56.7%57,394 | 43.3%43,836 | 101,230 |
| 1992 | 20 | D | 64.9%72,679 | 35.1%39,388 | 112,067 |
| 1990 | 20 | R | 34.5%65,101 | 59.8%112,962 | 188,925 |
| 1988 | 20 | R | 27.1%62,037 | 71.1%162,779 | 229,006 |
| 1986 | 20 | R | 27.4%49,027 | 72.6%129,989 | 179,016 |
| 1984 | 20 | R | 29.1%62,307 | 70.9%151,732 | 214,039 |
| 1982 | 20 | R | 31.9%57,769 | 68.1%123,312 | 181,081 |
| 1980 | 20 | R | 17.0%43,024 | 78.8%199,674 | 253,303 |
| 1978 | 20 | R | 33.6%65,695 | 66.4%129,714 | 195,409 |
| 1976 | 20 | R | 32.8%71,193 | 67.2%146,158 | 217,351 |
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 |
Anchored in the Los Angeles area, CA-20 posted a 37.8-point Democratic presidential margin in 2024, placing it among the most lopsided congressional districts in the state and reflecting a heavily urban, majority-minority electorate.
Across the recorded series it reached a Republican high of 35.5 points in 2012. Between 2020 and 2024 the district moved 6.0 points toward the Republican candidate; the 2024 margin was 32.2 points.
A population of 762,823, a 41% non-Hispanic-white share, and a median household income of $84,414 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 4 and Congressional District 23.
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 20th Congressional District. Akashic. https://akashic.app/cd/0620/. Accessed May 20, 2026. License: CC BY 4.0.