18 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Pocatello | Bannock County | 59,129 |
| Post Falls | Kootenai County | 49,048 |
| Payette | Payette County | 9,031 |
| Preston | Franklin County | 6,427 |
| Ponderay | Bonner County | 2,364 |
| Parma | Canyon County | 2,246 |
| Paul | Minidoka County | 1,984 |
| Priest River | Bonner County | 1,933 |
| Pinehurst | Shoshone County | 1,834 |
| Plummer | Benewah County | 1,179 |
| Potlatch | Latah County | 831 |
| Paris | Bear Lake County | 562 |
| Pierce | Clearwater County | 546 |
| Parker | Fremont County | 296 |
| Peck | Nez Perce County | 175 |
| Parkline | Benewah County | 76 |
| Placerville | Boise County | 49 |
| Princeton | Latah County | 2 |