U.S. House seat for Washington's 1st congressional district. Representatives serve two-year terms.

7 candidates filed, 2 active for the 2026 House election in Washington District 1. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Suzan K. Delbene D | 63.2% | 359,751 | |
| 2022 | Suzan K Delbene D | 63.6% | 286,321 | |
| 2020 | Suzan K Delbene D | 58.6% | 426,351 | |
| 2018 | Suzan Delbene D | 59.3% | 332,743 | |
| 2016 | Suzan K Delbene D | 55.4% | 349,398 | |
| 2014 | Suzan K Delbene D | 55.0% | 225,579 | |
| 2012 | Suzan Delbene D | 53.9% | 328,212 | |
| 2010 | Jay Inslee D | 57.7% | 299,379 | |
| 2008 | Jay Inslee D | 67.8% | 345,020 | |
| 2006 | Jay Inslee D | 67.7% | 241,937 | |
| 2004 | Jay Inslee D | 62.3% | 327,769 | |
| 2002 | Jay Inslee D | 55.6% | 205,034 | |
| 2000 | Jay Inslee D | 54.6% | 285,636 | |
| 1998 | Jay Inslee D | 49.8% | 226,473 | |
| 1996 | Rick White R | 53.7% | 264,135 |