2 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| American Falls | 1 | 5,011 | 4,567 | 1.5% | 3,105 | 2 | City |
| Rockland | 2 | 274 | 241 | 2.24% | 942 | 0 | City |
American Falls is the largest city in Power County, with a population of 5,011.
Rockland is the smallest city in Power County, with a population of 274.
There are 2 cities in Power County, Idaho.