There are 14 zip codes in Butler County, Ohio. The most populated is 45011, located in Hamilton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
45011Hamilton73,596
45069West Chester55,414
45044Middletown53,909
45013Hamilton52,953
45014Fairfield46,023
45042Middletown28,812
45056Oxford27,391
45067Trenton15,085
45050Monroe11,833
45015Hamilton11,602
45053Okeana3,865
45064Somerville3,257
45062Seven Mile756
45055Overpeck179

Butler County, Ohio Zip Codes by Population (2024)