| 52243 American College Testing | 319 | Johnson County | Iowa (IA) |
| 52241 Coralville | 319 | Johnson County | Iowa (IA) |
| 52322 Cosgrove | 319 | Johnson County | Iowa (IA) |
| 52338 Cou Falls | 319 | Johnson County | Iowa (IA) |
| 52235 Hills | 319 | Johnson County | Iowa (IA) |
| 52240 Iowa City | 319 | Johnson County | Iowa (IA) |
| 52241 Iowa City | 319 | Johnson County | Iowa (IA) |
| 52242 Iowa City | 319 | Johnson County | Iowa (IA) |
| 52243 Iowa City | 319 | Johnson County | Iowa (IA) |
| 52244 Iowa City | 319 | Johnson County | Iowa (IA) |
| 52245 Iowa City | 319 | Johnson County | Iowa (IA) |
| 52246 Iowa City | 319 | Johnson County | Iowa (IA) |
| 52755 Lone Tree | 319 | Johnson County | Iowa (IA) |
| 52317 North Liberty | 319 | Johnson County | Iowa (IA) |
| 52319 Oakdale | 319 | Johnson County | Iowa (IA) |
| 52322 Oxford | 319 | Johnson County | Iowa (IA) |
| 52755 River Junction | 319 | Johnson County | Iowa (IA) |
| 52333 Solon | 319 | Johnson County | Iowa (IA) |
| 52338 Swisher | 319 | Johnson County | Iowa (IA) |
| 52340 Tiffin | 319 | Johnson County | Iowa (IA) |
| 52333 Twin View Heights | 319 | Johnson County | Iowa (IA) |
| 52246 University Heights | 319 | Johnson County | Iowa (IA) |
| 52322 Windham | 319 | Johnson County | Iowa (IA) |