2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| American Falls | 1 | 4,937 | 4,567 | 1.52% | 3,059 | 2 | City |
| Rockland | 2 | 268 | 241 | 1.9% | 921 | 0 | City |
American Falls is the largest city in Power County, with a population of 4,937.
Rockland is the smallest city in Power County, with a population of 268.
There are 2 cities in Power County, Idaho.