| Zip Code | City | Population ↓ |
|---|---|---|
| 43302 | Marion | 55,090 |
| 43342 | Prospect | 3,699 |
| 43314 | Caledonia | 2,555 |
| 43332 | La Rue | 1,585 |
| 43356 | Waldo | 1,111 |
| 43341 | New Bloomington | 835 |
| 43337 | Morral | 769 |
| 43322 | Green Camp | 447 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Marion County, Ohio (US Census).