| Zip Code | City | Population ↓ |
|---|---|---|
| 45631 | Gallipolis | 13,061 |
| 45614 | Bidwell | 5,077 |
| 45686 | Vinton | 3,704 |
| 45623 | Crown City | 3,480 |
| 45658 | Patriot | 2,541 |
| 45620 | Cheshire | 754 |
| 45674 | Rio Grande | 743 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Gallia County, Ohio (US Census).