| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| WA-01 | DEM | 349,398 | 55.4% | D+10.8 | |
| WA-02 | Rick LarsenDEM | DEM | 325,408 | 64.0% | D+28.0 |
| WA-03 | REP | 313,277 | 61.8% | R+23.5 | |
| WA-04 | REP | 229,919 | 57.6% | R+100.0 | |
| WA-05 | REP | 323,534 | 59.6% | R+19.3 | |
| WA-06 | DEM | 327,834 | 61.5% | D+23.1 | |
| WA-07 | DEM | 378,754 | 56.0% | D+100.0 | |
| WA-08 | REP | 320,865 | 60.2% | R+20.4 | |
| WA-09 | Adam SmithDEM | DEM | 281,482 | 72.9% | D+45.8 |
| WA-10 | Denny HeckDEM | DEM | 290,564 | 58.7% | D+17.3 |