6 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 63401 | Hannibal | 21,167 |
| 63461 | Palmyra | 5,452 |
| 63456 | Monroe City | 4,995 |
| 63454 | Maywood | 1,166 |
| 63463 | Philadelphia | 825 |
| 63471 | Taylor | 805 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 6 ZCTAs in Marion County, Missouri (US Census).