18 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Pocatello | Bannock County | 58,680 |
| Post Falls | Kootenai County | 47,424 |
| Payette | Payette County | 8,892 |
| Preston | Franklin County | 6,293 |
| Parma | Canyon County | 2,222 |
| Ponderay | Bonner County | 2,187 |
| Priest River | Bonner County | 1,890 |
| Paul | Minidoka County | 1,853 |
| Pinehurst | Shoshone County | 1,809 |
| Plummer | Benewah County | 1,152 |
| Potlatch | Latah County | 820 |
| Paris | Bear Lake County | 558 |
| Pierce | Clearwater County | 533 |
| Parker | Fremont County | 297 |
| Peck | Nez Perce County | 173 |
| Princeton | Latah County | 149 |
| Parkline | Benewah County | 56 |
| Placerville | Boise County | 48 |