| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| WA-01 | Jay InsleeDEM | DEM | 327,769 | 62.3% | D+26.3 |
| WA-02 | Rick LarsenDEM | DEM | 316,682 | 63.9% | D+30.3 |
| WA-03 | Brian BairdDEM | DEM | 312,653 | 61.9% | D+23.9 |
| WA-04 | Doc HastingsREP | REP | 247,113 | 62.6% | R+25.1 |
| WA-05 | REP | 300,933 | 59.7% | R+19.4 | |
| WA-06 | DEM | 294,147 | 69.0% | D+38.0 | |
| WA-07 | DEM | 337,528 | 80.7% | D+61.4 | |
| WA-08 | REP | 336,499 | 51.5% | R+4.8 | |
| WA-09 | Adam SmithDEM | DEM | 256,671 | 63.3% | D+28.9 |