| 52037 Delmar | 563 | Clinton County | Iowa (IA) |
| 52037 North Welton | 563 | Clinton County | Iowa (IA) |
| 52254 Elwood | 563 | Clinton County | Iowa (IA) |
| 52254 Lost Nation | 563 | Clinton County | Iowa (IA) |
| 52701 Andover | 563 | Clinton County | Iowa (IA) |
| 52727 Bryant | 563 | Clinton County | Iowa (IA) |
| 52729 Calamus | 563 | Clinton County | Iowa (IA) |
| 52730 Camanche | 563 | Clinton County | Iowa (IA) |
| 52730 Shaffton | 563 | Clinton County | Iowa (IA) |
| 52730 Folletts | 563 | Clinton County | Iowa (IA) |
| 52731 Charlotte | 563 | Clinton County | Iowa (IA) |
| 52731 Petersville | 563 | Clinton County | Iowa (IA) |
| 52731 Sugar Creek | 563 | Clinton County | Iowa (IA) |
| 52732 Clinton | 563 | Clinton County | Iowa (IA) |
| 52732 Elvira | 563 | Clinton County | Iowa (IA) |
| 52732 Hauntown | 563 | Clinton County | Iowa (IA) |
| 52732 Six Mile | 563 | Clinton County | Iowa (IA) |
| 52733 Clinton | 563 | Clinton County | Iowa (IA) |
| 52734 Clinton | 563 | Clinton County | Iowa (IA) |
| 52734 Seventh Avenue | 563 | Clinton County | Iowa (IA) |
| 52736 Clinton | 563 | Clinton County | Iowa (IA) |
| 52736 Promotional Fulfillment Corp | 563 | Clinton County | Iowa (IA) |
| 52742 De Witt | 563 | Clinton County | Iowa (IA) |
| 52742 Dewitt | 563 | Clinton County | Iowa (IA) |
| 52750 Gooselake | 563 | Clinton County | Iowa (IA) |
| 52750 Goose Lake | 563 | Clinton County | Iowa (IA) |
| 52751 Grand Mound | 563 | Clinton County | Iowa (IA) |
| 52757 Low Moor | 563 | Clinton County | Iowa (IA) |
| 52771 Clinton | 563 | Clinton County | Iowa (IA) |
| 52771 Teeds Grove | 563 | Clinton County | Iowa (IA) |
| 52777 Toronto | 563 | Clinton County | Iowa (IA) |
| 52777 Wheatland | 563 | Clinton County | Iowa (IA) |