13 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Carroll | 1 | 10,033 | 10,309 | -0.46% | 1,682 | 6 | City |
| Manning | 2 | 1,358 | 1,453 | -1.16% | 548 | 2 | City |
| Coon Rapids | 3 | 1,236 | 1,302 | -0.88% | 693 | 2 | City |
| Glidden | 4 | 1,134 | 1,151 | -0.26% | 1,019 | 1 | City |
| Arcadia | 5 | 617 | 530 | 2.49% | 624 | 1 | City |
| Breda | 6 | 487 | 501 | -0.41% | 659 | 1 | City |
| Templeton | 7 | 331 | 348 | -0.9% | 676 | 0 | City |
| Halbur | 8 | 266 | 272 | -0.37% | 1,255 | 0 | City |
| Dedham | 9 | 220 | 223 | 0% | 399 | 1 | City |
| Lidderdale | 10 | 158 | 169 | -1.25% | 65 | 2 | City |
| Lanesboro | 11 | 109 | 117 | -0.91% | 147 | 1 | City |
| Ralston | 12 | 75 | 78 | 0% | 38 | 2 | City |
| Willey | 13 | 71 | 74 | 0% | 285 | 0 | City |
Carroll is the largest city in Carroll County, with a population of 10,033.
Willey is the smallest city in Carroll County, with a population of 71.
There are 13 cities in Carroll County, Iowa.