| 50830 Afton | 641 | Union County | Iowa (IA) |
| 50831 Arispe | 641 | Union County | Iowa (IA) |
| 50149 Barney | 641 | Union County | Iowa (IA) |
| 50801 Creston | 641 | Union County | Iowa (IA) |
| 50842 Cromwell | 641 | Union County | Iowa (IA) |
| 50149 Lorimor | 641 | Union County | Iowa (IA) |
| 50861 Shannon City | 641 | Union County | Iowa (IA) |
| 50254 Talmage | 641 | Union County | Iowa (IA) |
| 50254 Thayer | 641 | Union County | Iowa (IA) |