4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| McCall | 1 | 4,200 | 3,718 | 2.34% | 463 | 9 | City |
| Cascade | 2 | 1,032 | 1,001 | 0.58% | 250 | 4 | City |
| Yellow Pine | 3 | 409 | 235 | 7.07% | 416 | 1 | CDP |
| Donnelly | 4 | 256 | 251 | 0.39% | 359 | 1 | City |
McCall is the largest city in Valley County, with a population of 4,200.
Donnelly is the smallest city in Valley County, with a population of 256.
There are 4 cities in Valley County, Idaho.