California 48th Congressional District
Akashic| Year | Margin (D minus R) |
|---|---|
| 2008 | −5.4% |
| 2012 | −9.2% |
| 2016 | −0.3% |
| 2020 | +7.2% |
| 2024 | +3.4% |
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 | 48 | R | 40.7%146,665 | 59.3%213,625 | 360,290 |
| 2022 | 48 | R | 39.6%101,900 | 60.4%155,171 | 257,071 |
| 2020 | 48 | R | 48.9%193,362 | 51.1%201,738 | 395,100 |
| 2018 | 48 | D | 53.6%157,837 | 46.4%136,899 | 294,736 |
| 2016 | 48 | R | 41.7%127,715 | 58.3%178,701 | 306,416 |
| 2014 | 48 | R | 35.9%62,713 | 64.1%112,082 | 174,795 |
| 2012 | 48 | R | 39.0%113,358 | 61.0%177,144 | 290,502 |
| 2010 | 48 | R | 36.4%88,465 | 59.9%145,481 | 242,719 |
| 2008 | 48 | R | 40.7%125,537 | 55.6%171,658 | 308,702 |
| 2006 | 48 | R | 37.2%74,647 | 59.9%120,130 | 200,527 |
| 2004 | 48 | R | 32.2%93,525 | 65.0%189,004 | 290,872 |
| 2002 | 48 | R | 28.4%51,058 | 68.4%122,884 | 179,549 |
| 2000 | 48 | R | 28.3%74,073 | 61.4%160,627 | 261,478 |
| 1998 | 48 | R | 0.0%0 | 76.9%138,948 | 180,719 |
| 1996 | 48 | R | 26.9%59,558 | 65.9%145,814 | 221,391 |
| 1994 | 48 | R | 22.2%43,523 | 73.4%143,570 | 195,636 |
| 1992 | 48 | R | 29.2%67,415 | 61.1%140,935 | 230,495 |
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-48 spans affluent beach cities from Huntington to Laguna Niguel, where college-educated suburban voters have made a once-safe Republican stronghold competitive — the 2024 presidential margin of R+3.6 reflects a district still moving.
Across the recorded series it reached a Democratic high of 7.2 points in 2020 and a Republican high of 9.2 points in 2012. Between 2020 and 2024 the district moved 3.8 points toward the Republican candidate; the 2024 margin was 3.4 points.
A population of 757,563, a 50% non-Hispanic-white share, and a median household income of $107,394 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 49 and Congressional District 50.
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 48th Congressional District. Akashic. https://akashic.app/cd/0648/. Accessed May 20, 2026. License: CC BY 4.0.