Founded on Dec 21, 1837, Clinton County is one of 99 counties in the state of Iowa. Historically, Clinton County was formed from Dubuque County and Wisconsin Territory. The city of Clinton is the county seat. With FIPS code of 45, Clinton County has a population of 46,463 and area of 695 square miles (1,800 km2).
List of all cities in Clinton County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Andover, IA | 52701 | 563 |
| Bryant, IA | 52727 | 563 |
| Calamus, IA | 52729 | 563 |
| Camanche, IA | 52730 | 563 |
| Charlotte, IA | 52731 | 563 |
| Clinton, IA | 52732 | 563 |
| 52733 | 563 | |
| 52734 | 563 | |
| 52736 | 563 | |
| 52771 | 563 | |
| De Witt, IA | 52742 | 563 |
| Delmar, IA | 52037 | 563 |
| Elvira, IA | 52732 | 563 |
| Elwood, IA | 52254 | 563 |
| Folletts, IA | 52730 | 563 |
| Goose Lake, IA | 52750 | 563 |
| Grand Mound, IA | 52751 | 563 |
| Hauntown, IA | 52732 | 563 |
| Lost Nation, IA | 52254 | 563 |
| Low Moor, IA | 52757 | 563 |
| North Welton, IA | 52037 | 563 |
| Petersville, IA | 52731 | 563 |
| Promotional Fulfillment Corp, IA | 52736 | 563 |
| Seventh Avenue, IA | 52734 | 563 |
| Shaffton, IA | 52730 | 563 |
| Six Mile, IA | 52732 | 563 |
| Sugar Creek, IA | 52731 | 563 |
| Teeds Grove, IA | 52771 | 563 |
| Toronto, IA | 52777 | 563 |
| Wheatland, IA | 52777 | 563 |