| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| WA-01 | Jay InsleeDEM | DEM | 299,379 | 57.7% | D+15.3 |
| WA-02 | Rick LarsenDEM | DEM | 303,963 | 51.1% | D+2.1 |
| WA-03 | REP | 288,453 | 53.0% | R+5.9 | |
| WA-04 | Doc HastingsREP | REP | 231,699 | 67.6% | R+35.3 |
| WA-05 | REP | 278,381 | 63.7% | R+27.3 | |
| WA-06 | DEM | 261,673 | 58.0% | D+16.1 | |
| WA-07 | DEM | 280,390 | 83.0% | D+83.0 | |
| WA-08 | REP | 309,877 | 52.0% | R+4.1 | |
| WA-09 | Adam SmithDEM | DEM | 225,594 | 54.9% | D+9.7 |