| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| WA-01 | Jay InsleeDEM | DEM | 345,020 | 67.8% | D+35.5 |
| WA-02 | Rick LarsenDEM | DEM | 348,467 | 62.4% | D+24.8 |
| WA-03 | Brian BairdDEM | DEM | 338,529 | 64.0% | D+28.0 |
| WA-04 | Doc HastingsREP | REP | 269,370 | 63.1% | R+26.2 |
| WA-05 | REP | 323,687 | 65.3% | R+30.6 | |
| WA-06 | DEM | 308,072 | 66.9% | D+33.7 | |
| WA-07 | DEM | 349,017 | 83.7% | D+67.3 | |
| WA-08 | REP | 362,926 | 52.8% | R+5.6 | |
| WA-09 | Adam SmithDEM | DEM | 269,375 | 65.5% | D+30.9 |