8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 43302 | Marion | 54,581 |
| 43342 | Prospect | 3,566 |
| 43314 | Caledonia | 2,506 |
| 43332 | La Rue | 1,762 |
| 43341 | New Bloomington | 1,005 |
| 43356 | Waldo | 900 |
| 43337 | Morral | 601 |
| 43322 | Green Camp | 451 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Marion County, Ohio (US Census).