24 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Tacoma | Pierce County | 230,313 |
| Tumwater | Thurston County | 28,246 |
| Tukwila | King County | 21,608 |
| Terrace Heights | Kittitas County | 9,871 |
| Toppenish | Yakima County | 8,616 |
| Tehaleh | Pierce County | 7,810 |
| Tanglewilde | Thurston County | 6,965 |
| Tracyton | Kitsap County | 5,723 |
| Town and Country | Spokane County | 5,481 |
| Three Lakes | Snohomish County | 3,509 |
| Tenino | Thurston County | 1,976 |
| Tieton | Yakima County | 1,666 |
| Tonasket | Okanogan County | 1,141 |
| Twisp | Okanogan County | 1,140 |
| Trout Lake | Klickitat County | 939 |
| Tekoa | Whitman County | 808 |
| Toledo | Lewis County | 799 |
| Taholah | Grays Harbor County | 768 |
| Tampico | Yakima County | 545 |
| Touchet | Walla Walla County | 333 |
| Torboy | Ferry County | 300 |
| Twin Lakes | Ferry County | 117 |
| Thorp | Kittitas County | 112 |
| Tokeland | Pacific County | 91 |