- Tacoma (Population: 193,556)
- Tanglewilde-Thompson Place (Population: 5,670)
- Tanner (Population: 2,966)
- Tenino (Population: 1,447)
- Terrace Heights (Population: 6,447)
- Three Lakes (Population: 2,492)
- Tieton (Population: 1,154)
- Toppenish (Population: 8,946)
- Town and Country (Population: 4,452)
- Tracyton (Population: 3,267)
- Trentwood (Population: 4,388)
- Tukwila (Population: 17,181)
- Tulalip Bay (Population: 1,561)
- Tumwater (Population: 12,698)
