| City | County | 2025 Pop. ↓ |
|---|---|---|
| Tigard | Washington County | 55,972 |
| Tualatin | Washington County | 27,049 |
| The Dalles | Wasco County | 15,636 |
| Troutdale | Multnomah County | 15,326 |
| Talent | Jackson County | 6,343 |
| Tillamook | Tillamook County | 5,178 |
| Three Rivers | Deschutes County | 3,949 |
| Tri-City | Douglas County | 3,780 |
| Toledo | Lincoln County | 3,492 |
| Turner | Marion County | 2,355 |
| Terrebonne | Jefferson County | 1,308 |
| Tangent | Linn County | 1,244 |
| Tetherow | Deschutes County | 895 |
| Tumalo | Deschutes County | 737 |
| Takilma | Josephine County | 697 |
| Trail | Jackson County | 629 |
| Trent | Lane County | 406 |
| Tutuilla | Umatilla County | 372 |
| Tygh Valley | Wasco County | 16 |