12 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Jennings Lodge | Clackamas County | 7,749 |
| Junction City | Lane County | 7,389 |
| Juniper Canyon | Crook County | 3,561 |
| Jefferson | Marion County | 3,287 |
| Jacksonville | Jackson County | 2,925 |
| John Day | Grant County | 1,632 |
| Joseph | Wallowa County | 1,179 |
| Jasper | Lane County | 718 |
| Johnson City | Clackamas County | 555 |
| Jeffers Gardens | Clatsop County | 146 |
| Jordan Valley | Malheur County | 139 |
| Juntura | Malheur County | 26 |