17 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Albany | Linn County | 57,471 |
| Aloha | Washington County | 54,271 |
| Ashland | Jackson County | 20,724 |
| Altamont | Klamath County | 19,979 |
| Astoria | Clatsop County | 9,764 |
| Aumsville | Marion County | 4,198 |
| Amity | Yamhill County | 1,786 |
| Athena | Umatilla County | 1,177 |
| Aurora | Marion County | 1,112 |
| Adair Village | Benton County | 1,049 |
| Arlington | Gilliam County | 613 |
| Adams | Umatilla County | 388 |
| Annex | Malheur County | 320 |
| Alpine | Benton County | 244 |
| Adrian | Malheur County | 162 |
| Alsea | Benton County | 121 |
| Antelope | Wasco County | 38 |