There are 7 zip codes in Madison County, Ohio. The most populated is 43140, located in London. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
43140London23,812
43064Plain City17,188
43162West Jefferson6,837
43143Mount Sterling5,931
43153South Solon1,113
43029Irwin532
43151Sedalia257

Madison County, Ohio Zip Codes by Population (2024)