| Public power utility | Retail electric customers |
|---|---|
| City of Seattle | 512,498 |
| PUD No 1 of Snohomish County | 382,062 |
| PUD No 1 of Clark County | 239,896 |
| City of Tacoma | 203,185 |
| PUD No 1 of Benton County | 57,827 |
| PUD No 2 of Grant County | 55,943 |
| PUD No 1 of Cowlitz County | 53,716 |
| PUD No 1 of Chelan County | 50,137 |
| PUD No 1 of Grays Harbor County | 45,587 |
| PUD No 3 of Mason County | 36,407 |
| PUD No 1 of Lewis County | 34,766 |
| PUD No 1 of Clallam County | 34,080 |
| PUD No 1 of Franklin County | 29,752 |
| City of Richland | 27,563 |
| PUD No 1 of Okanogan County | 22,155 |
| PUD No 1 of Jefferson County | 20,956 |
| PUD No 2 of Pacific County | 18,577 |
| PUD No 1 of Douglas County | 17,553 |
| PUD No 1 of Klickitat County | 14,286 |
| Vera Irrigation District #15 | 13,550 |
| City of Port Angeles | 11,028 |
| City of Centralia | 10,759 |
| City of Ellensburg | 10,178 |
| PUD No 1 of Pend Oreille County | 10,101 |
| PUD No 1 of Skamania Co | 6,570 |
| City of Cheney | 6,216 |
| PUD No 1 of Mason County | 5,667 |
| City of Blaine | 3,884 |
| Town of Steilacoom | 3,836 |
| PUD No 1 of Kittitas County | 3,831 |
| PUD No 1 of Ferry County | 3,801 |
| City of Milton | 3,619 |
| PUD No 1 of Wahkiakum County | 2,797 |
| City of Chewelah | 1,368 |
| Town of Eatonville | 1,288 |
| City of McCleary | 1,199 |
| City of Sumas | 992 |
| Town of Ruston | 605 |
| City of Coulee Dam | 602 |
| PUD No 1 of Asotin County | 3 |
| PUD No 1 of Whatcom County | 1 |
| Energy Northwest | Not published |
Largest first by retail electric customers, as each employer reports it to its federal registry.
Source: U.S. Energy Information Administration, Annual Electric Power Industry Report (Form EIA-861), 2024 final data. Data captured October 2, 2026.
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