U.S. House seat for California's 48th congressional district. Representatives serve two-year terms.

24 candidates filed, 2 active for the 2026 House election in California District 48. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Darrell Issa R | 59.3% | 360,290 | |
| 2022 | Darrell Issa R | 60.4% | 257,071 | |
| 2020 | Michelle Steel R | 51.1% | 395,100 | |
| 2018 | Harley Rouda D | 53.6% | 294,736 | |
| 2016 | Dana Rohrabacher R | 58.3% | 306,416 | |
| 2014 | Dana Rohracher R | 64.1% | 174,795 | |
| 2012 | Dana Rohrabacher R | 61.0% | 290,502 | |
| 2010 | John Campbell R | 59.9% | 242,719 | |
| 2008 | John Campbell R | 55.6% | 308,702 | |
| 2006 | John Campbell R | 59.9% | 200,527 | |
| 2004 | Christopher Cox R | 65.0% | 290,872 | |
| 2002 | Christopher Cox R | 68.4% | 179,549 | |
| 2000 | Darrell Issa R | 61.4% | 261,478 | |
| 1998 | Ron Packard R | 76.9% | 180,719 | |
| 1996 | Ron Packard R | 65.9% | 221,391 |