2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| American Falls | 1 | 4,927 | 4,561 | 1.5% | 3,053 | 1.61 | City |
| Rockland | 2 | 270 | 240 | 2.27% | 928 | 0.29 | City |
American Falls is the largest city in Power County, with a population of 4,927.
Rockland is the smallest city in Power County.
There are 2 cities in Power County, Idaho.