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
Population
City
4501173,596Hamilton
4506955,414West Chester
4504453,909Middletown
4501352,953Hamilton
4501446,023Fairfield
4504228,812Middletown
4505627,391Oxford
4506715,085Trenton
4505011,833Monroe
4501511,602Hamilton
450533,865Okeana
450643,257Somerville
45062756Seven Mile
45055179Overpeck

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