| Zip Code | City | Population ↓ |
|---|---|---|
| 52732 | Clinton | 25,984 |
| 52742 | De Witt | 7,581 |
| 52730 | Camanche | 5,042 |
| 52777 | Wheatland | 1,261 |
| 52751 | Grand Mound | 985 |
| 52037 | Delmar | 943 |
| 52729 | Calamus | 914 |
| 52254 | Lost Nation | 906 |
| 52731 | Charlotte | 777 |
| 52750 | Goose Lake | 513 |
| 52727 | Bryant | 375 |
| 52757 | Low Moor | 239 |
| 52774 | Welton | 141 |
| 52701 | Andover | 121 |
| 52771 | Teeds Grove | 55 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 15 ZCTAs in Clinton County, Iowa (US Census).