Directory of Power Plants in Washington
| County | State Rank | Active Plants | Mar 2026 Generation |
|---|
| Grant County, WA | # 1 | 9 | 28.9 TWh |
| Chelan County, WA | # 2 | 6 | 13.1 TWh |
| Douglas County, WA | # 3 | 1 | 11.2 TWh |
| Benton County, WA | # 4 | 7 | 8.0 TWh |
| Lewis County, WA | # 5 | 8 | 7.3 TWh |
| Klickitat County, WA | # 6 | 16 | 5.5 TWh |
| Whatcom County, WA | # 7 | 13 | 4.4 TWh |
| Pend Oreille County, WA | # 8 | 3 | 4.1 TWh |
| Cowlitz County, WA | # 9 | 6 | 3.8 TWh |
| Columbia County, WA | # 10 | 4 | 3.5 TWh |
| Grays Harbor County, WA | # 11 | 6 | 3.4 TWh |
| Walla Walla County, WA | # 12 | 4 | 3.4 TWh |
| Pierce County, WA | # 13 | 14 | 2.3 TWh |
| Whitman County, WA | # 14 | 6 | 1.8 TWh |
| Skagit County, WA | # 15 | 4 | 1.4 TWh |
| County | State Rank | Active Plants | Mar 2026 Generation |
|---|
| Clark County, WA | # 16 | 2 | 1.3 TWh |
| Kittitas County, WA | # 17 | 9 | 1.2 TWh |
| Garfield County, WA | # 18 | 2 | 806.7 GWh |
| Lincoln County, WA | # 19 | 2 | 641.5 GWh |
| Spokane County, WA | # 20 | 7 | 556.8 GWh |
| Skamania County, WA | # 21 | 1 | 548.4 GWh |
| Adams County, WA | # 22 | 4 | 465.3 GWh |
| Thurston County, WA | # 23 | 4 | 441.5 GWh |
| Snohomish County, WA | # 24 | 9 | 401.9 GWh |
| King County, WA | # 25 | 12 | 361.2 GWh |
| Stevens County, WA | # 26 | 4 | 346.7 GWh |
| Mason County, WA | # 27 | 3 | 304.6 GWh |
| Yakima County, WA | # 28 | 12 | 228.5 GWh |
| Franklin County, WA | # 29 | 3 | 12.8 GWh |
| Jefferson County, WA | # 30 | 3 | 3.2 GWh |
