12 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Forest Grove | Washington County | 27,570 |
| Four Corners | Marion County | 16,219 |
| Fairview | Multnomah County | 10,995 |
| Florence | Lane County | 9,518 |
| Foots Creek | Jackson County | 1,163 |
| Falls City | Polk County | 1,057 |
| Falcon Heights | Klamath County | 933 |
| Fairview | Multnomah County | 644 |
| Fossil | Wheeler County | 451 |
| Fair Oaks | Douglas County | 240 |
| Fort Klamath | Klamath County | 165 |
| Fort Hill | Polk County | 76 |