There are 8 zip codes in Gallia County, Ohio. The most populated is 45631, located in Gallipolis. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4563113,061Gallipolis
456145,077Bidwell
456863,704Vinton
456233,480Crown City
456582,541Patriot
456851,485Thurman
45620754Cheshire
45674743Rio Grande
showing: 8 rows

Zip Codes in Gallia County, Ohio by Population (2024)