U.S. House seat for California's 12th congressional district. Representatives serve two-year terms.

3 candidates filed, 2 active for the 2026 House election in California District 12. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Lateefah Simon D | 65.4% | 283,025 | |
| 2022 | Barbara Lee D | 90.5% | 239,969 | |
| 2020 | Nancy Pelosi D | 77.6% | 362,950 | |
| 2018 | Nancy Pelosi D | 86.8% | 317,072 | |
| 2016 | Nancy Pelosi D | 80.9% | 338,845 | |
| 2014 | Nancy Pelosi D | 83.3% | 192,264 | |
| 2012 | Nancy Pelosi D | 85.1% | 298,187 | |
| 2010 | Jackie Speier D | 75.6% | 201,130 | |
| 2008 | Jackie Speier D | 75.1% | 266,853 | |
| 2006 | Tom Lantos D | 76.0% | 182,324 | |
| 2004 | Tom Lantos D | 68.0% | 252,599 | |
| 2002 | Tom Lantos D | 68.1% | 154,984 | |
| 2000 | Tom Lantos D | 74.5% | 212,556 | |
| 1998 | Tom Lantos D | 74.0% | 173,212 | |
| 1996 | Tom Lantos D | 71.7% | 207,908 |