13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Carroll | 1 | 10,079 | 10,309 | -0.45% | 1,690 | 6 | City |
| Manning | 2 | 1,374 | 1,453 | -1.15% | 555 | 2 | City |
| Coon Rapids | 3 | 1,247 | 1,302 | -0.87% | 699 | 2 | City |
| Glidden | 4 | 1,137 | 1,151 | -0.26% | 1,022 | 1 | City |
| Arcadia | 5 | 602 | 530 | 2.38% | 609 | 1 | City |
| Breda | 6 | 489 | 501 | -0.61% | 662 | 1 | City |
| Templeton | 7 | 334 | 348 | -0.89% | 682 | 0 | City |
| Halbur | 8 | 267 | 272 | -0.37% | 1,259 | 0 | City |
| Dedham | 9 | 220 | 223 | -0.45% | 399 | 1 | City |
| Lidderdale | 10 | 160 | 169 | -1.23% | 66 | 2 | City |
| Lanesboro | 11 | 110 | 117 | -1.79% | 148 | 1 | City |
| Ralston | 12 | 75 | 78 | -1.32% | 38 | 2 | City |
| Willey | 13 | 71 | 74 | -1.39% | 285 | 0 | City |
Carroll is the largest city in Carroll County, with a population of 10,079.
Willey is the smallest city in Carroll County, with a population of 71.
There are 13 cities in Carroll County, Iowa.