| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Carroll | 1 | 10,046 | 10,311 | -0.39% | 1,684 | 6 | City |
| Manning | 2 | 1,360 | 1,450 | -1.09% | 549 | 2 | City |
| Coon Rapids | 3 | 1,240 | 1,302 | -0.88% | 695 | 2 | City |
| Glidden | 4 | 1,130 | 1,149 | -0.26% | 1,015 | 1 | City |
| Arcadia | 5 | 600 | 528 | 2.39% | 607 | 1 | City |
| Breda | 6 | 486 | 501 | -0.41% | 658 | 1 | City |
| Templeton | 7 | 336 | 348 | -0.88% | 686 | 0 | City |
| Halbur | 8 | 265 | 272 | -0.38% | 1,250 | 0 | City |
| Dedham | 9 | 218 | 222 | -0.46% | 395 | 1 | City |
| Lidderdale | 10 | 157 | 167 | -1.26% | 65 | 2 | City |
| Lanesboro | 11 | 110 | 118 | -1.79% | 148 | 1 | City |
| Ralston | 12 | 74 | 78 | -1.33% | 38 | 2 | City |
| Willey | 13 | 70 | 74 | -1.41% | 281 | 0 | City |
Carroll is the largest city in Carroll County, with a population of 10,046.
Willey is the smallest city in Carroll County, with a population of 70.
There are 13 cities in Carroll County, Iowa.