U.S. House seat for Washington's 10th congressional district. Representatives serve two-year terms.

7 candidates filed, 2 active for the 2026 House election in Washington District 10. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Marilyn Strickland D | 58.7% | 347,224 | |
| 2022 | Marilyn Strickland D | 57.1% | 267,321 | |
| 2020 | Marilyn Strickland D | 58.1% | 288,977 | |
| 2018 | Denny Heck D | 61.5% | 270,075 | |
| 2016 | Denny Heck D | 58.7% | 290,564 | |
| 2014 | Denny Heck D | 54.7% | 181,492 | |
| 2012 | Denny Heck D | 58.6% | 278,417 |