| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| WA-01 | Jay InsleeDEM | DEM | 285,636 | 54.5% | D+11.9 |
| WA-02 | Rick LarsenDEM | DEM | 293,180 | 50.0% | D+4.1 |
| WA-03 | Brian BairdDEM | DEM | 282,664 | 56.4% | D+15.8 |
| WA-04 | Doc HastingsREP | REP | 235,104 | 60.9% | R+23.7 |
| WA-05 | REP | 251,214 | 57.3% | R+18.4 | |
| WA-06 | DEM | 254,713 | 64.7% | D+33.6 | |
| WA-07 | DEM | 265,809 | 72.8% | D+72.8 | |
| WA-08 | REP | 294,468 | 62.2% | R+26.6 | |
| WA-09 | Adam SmithDEM | DEM | 219,623 | 61.7% | D+26.7 |