21 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Portland | Multnomah County | 631,394 |
| Pendleton | Umatilla County | 17,030 |
| Prineville | Crook County | 12,173 |
| Philomath | Benton County | 5,908 |
| Phoenix | Jackson County | 4,590 |
| Prineville Lake Acres | Crook County | 1,833 |
| Pacific City | Tillamook County | 1,731 |
| Pilot Rock | Umatilla County | 1,307 |
| Port Orford | Curry County | 1,105 |
| Prairie City | Grant County | 812 |
| Prospect | Jackson County | 765 |
| Powers | Coos County | 701 |
| Pleasant Valley | Tillamook County | 680 |
| Pine Hollow | Wasco County | 469 |
| Parkdale | Hood River County | 269 |
| Paisley | Lake County | 247 |
| Pronghorn | Crook County | 208 |
| Peoria | Linn County | 200 |
| Pine Grove | Wasco County | 87 |
| Prescott | Columbia County | 82 |
| Plush | Lake County | 36 |