24 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Tacoma | Pierce County | 225,030 |
| Tumwater | Thurston County | 27,971 |
| Tukwila | King County | 20,722 |
| Terrace Heights | Kittitas County | 10,492 |
| Toppenish | Yakima County | 8,534 |
| Tehaleh | Pierce County | 7,308 |
| Tanglewilde | Thurston County | 6,536 |
| Tracyton | Kitsap County | 5,709 |
| Town Country | Spokane County | 5,340 |
| Three Lakes | Snohomish County | 3,668 |
| Tenino | Thurston County | 1,989 |
| Tieton | Yakima County | 1,805 |
| Tonasket | Okanogan County | 1,118 |
| Twisp | Okanogan County | 1,110 |
| Trout Lake | Klickitat County | 888 |
| Toledo | Lewis County | 848 |
| Taholah | Grays Harbor County | 819 |
| Tekoa | Whitman County | 803 |
| Touchet | Walla Walla County | 501 |
| Tampico | Yakima County | 491 |
| Torboy | Ferry County | 284 |
| Twin Lakes | Ferry County | 93 |
| Tokeland | Pacific County | 90 |
| Thorp | Kittitas County | 52 |