| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Council Bluffs | 1 | 62,603 | 62,792 | -0.12% | 1,457 | 43 | City |
| Carter Lake | 2 | 3,655 | 3,789 | -0.41% | 2,037 | 2 | City |
| Avoca | 3 | 1,659 | 1,689 | -0.12% | 696 | 2 | City |
| Oakland | 4 | 1,488 | 1,521 | -0.07% | 830 | 2 | City |
| Treynor | 5 | 1,105 | 1,023 | 1.56% | 1,700 | 1 | City |
| Underwood | 6 | 958 | 950 | 0.31% | 880 | 1 | City |
| Neola | 7 | 903 | 914 | 0% | 1,130 | 1 | City |
| Carson | 8 | 757 | 766 | 0% | 1,159 | 1 | City |
| Shelby | 9 | 728 | 725 | 0.14% | 353 | 2 | City |
| Walnut | 10 | 711 | 742 | -0.56% | 323 | 2 | City |
| Crescent | 11 | 614 | 627 | -0.16% | 635 | 1 | City |
| Minden | 12 | 561 | 599 | -1.06% | 989 | 1 | City |
| Macedonia | 13 | 263 | 268 | 0% | 1,114 | 0 | City |
| Hancock | 14 | 194 | 200 | -0.51% | 268 | 1 | City |
| McClelland | 15 | 143 | 145 | 0% | 524 | 0 | City |
Council Bluffs is the largest city in Pottawattamie County, with a population of 62,603.
McClelland is the smallest city in Pottawattamie County, with a population of 143.
There are 15 cities in Pottawattamie County, Iowa.