Johnson County, Iowa Zip Codes
| Iowa City | 36,475 |
| Coralville | 22,494 |
| Iowa City | 22,340 |
| North Liberty | 22,119 |
| Iowa City | 22,088 |
| Solon | 7,237 |
| Kalona | 5,222 |
| Tiffin | 5,192 |
| Iowa City | 4,140 |
| Swisher | 3,886 |
| Lone Tree | 2,227 |
| Oxford | 1,913 |
| Hills | 889 |
- Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.