4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| McCall | 1 | 4,296 | 3,721 | 2.75% | 474 | 9.06 | City |
| Cascade | 2 | 1,020 | 999 | 0.39% | 247 | 4.12 | City |
| Yellow Pine | 3 | 409 | 235 | 7.07% | 416 | 0.98 | CDP |
| Donnelly | 4 | 259 | 251 | 0.78% | 363 | 0.71 | City |
McCall is the largest city in Valley County, with a population of 4,296.
Donnelly is the smallest city in Valley County.
There are 4 cities in Valley County, Idaho.