| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| WA-01 | Jay InsleeDEM | DEM | 205,034 | 55.6% | D+14.3 |
| WA-02 | Rick LarsenDEM | DEM | 202,150 | 50.1% | D+4.3 |
| WA-03 | Brian BairdDEM | DEM | 193,329 | 61.7% | D+23.4 |
| WA-04 | Doc HastingsREP | REP | 161,829 | 66.9% | R+33.8 |
| WA-05 | REP | 202,282 | 62.7% | R+30.5 | |
| WA-06 | DEM | 196,444 | 64.2% | D+32.9 | |
| WA-07 | DEM | 211,003 | 74.1% | D+52.1 | |
| WA-08 | REP | 203,335 | 59.8% | R+22.5 | |
| WA-09 | Adam SmithDEM | DEM | 163,710 | 58.5% | D+19.9 |