There are 11 zip codes in Brown County, Ohio. The most populated is 45121, located in Georgetown. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
451219,132Georgetown
451548,652Mount Orab
451715,762Sardinia
451304,116Hamersville
451183,663Fayetteville
451673,266Ripley
451012,059Aberdeen
451681,159Russellville
45131287Higginsport
45115223Decatur
4511928Feesburg

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