Identifiers: city
| Rank | Community | Population |
|---|---|---|
| 1 | Cedar Rapids (city), IA | 137,710 |
| 2 | Iowa City (city), IA | 74,828 |
| 3 | Marion (city), IA | 41,535 |
| 4 | Coralville (city), IA | 22,318 |
| 5 | North Liberty (city), IA | 20,479 |
| 6 | Hiawatha (city), IA | 7,183 |
| 7 | Mount Vernon (city), IA | 4,527 |
| 8 | Tiffin (city), IA | 4,512 |
| 9 | Robins (city), IA | 3,353 |
| 10 | Solon (city), IA | 3,018 |
| 11 | Fairfax (city), IA | 2,828 |
| 12 | Center Point (city), IA | 2,579 |
| 13 | Ely (city), IA | 2,328 |
| 14 | Lisbon (city), IA | 2,233 |
| 15 | Atkins (city), IA | 2,056 |
| 16 | Palo (city), IA | 1,407 |
| 17 | Walford (city), IA | 1,366 |
| 18 | University Heights (city), IA | 1,228 |
| 19 | Springville (city), IA | 1,154 |
| 20 | Mechanicsville (city), IA | 1,020 |