24 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Tacoma | Pierce County | 232,425 |
| Tumwater | Thurston County | 28,667 |
| Tukwila | King County | 21,580 |
| Terrace Heights | Kittitas County | 10,067 |
| Toppenish | Yakima County | 8,574 |
| Tehaleh | Pierce County | 8,331 |
| Tanglewilde | Thurston County | 7,037 |
| Tracyton | Kitsap County | 5,756 |
| Town and Country | Spokane County | 5,523 |
| Three Lakes | Snohomish County | 3,531 |
| Tenino | Thurston County | 1,996 |
| Tieton | Yakima County | 1,722 |
| Twisp | Okanogan County | 1,169 |
| Tonasket | Okanogan County | 1,149 |
| Trout Lake | Klickitat County | 964 |
| Toledo | Lewis County | 832 |
| Tekoa | Whitman County | 807 |
| Taholah | Grays Harbor County | 764 |
| Tampico | Yakima County | 561 |
| Touchet | Walla Walla County | 327 |
| Torboy | Ferry County | 320 |
| Twin Lakes | Ferry County | 124 |
| Thorp | Kittitas County | 103 |
| Tokeland | Pacific County | 87 |