U.S. House seat for California's 51st congressional district. Representatives serve two-year terms.

6 candidates filed, 2 active for the 2026 House election in California District 51. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Sara Jacobs D | 60.7% | 327,584 | |
| 2022 | Sara Jacobs D | 61.9% | 233,072 | |
| 2020 | Juan Vargas D | 68.3% | 242,437 | |
| 2018 | Juan Vargas D | 71.2% | 153,828 | |
| 2016 | Juan Vargas D | 72.8% | 199,524 | |
| 2014 | Juan Vargas D | 68.8% | 81,950 | |
| 2012 | Juan Vargas D | 71.5% | 159,398 | |
| 2010 | Bob Filner D | 60.1% | 143,911 | |
| 2008 | Bob Filner D | 72.7% | 203,825 | |
| 2006 | Bob Filner D | 67.4% | 115,835 | |
| 2004 | Bob Filner D | 61.6% | 180,879 | |
| 2002 | Bob Filner D | 57.9% | 102,787 | |
| 2000 | Randy \"Duke\" Cunningham R | 64.3% | 267,799 | |
| 1998 | Randy \"Duke\" Cunningham R | 61.0% | 206,878 | |
| 1996 | Randy \"Duke\" Cunningham R | 65.1% | 229,024 |