6 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 63401 | Hannibal | 21,125 |
| 63461 | Palmyra | 5,355 |
| 63456 | Monroe City | 4,938 |
| 63454 | Maywood | 1,000 |
| 63471 | Taylor | 966 |
| 63463 | Philadelphia | 718 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 6 ZCTAs in Marion County, Missouri (US Census).