There are 11 zip codes in Miami County, Ohio. The most populated is 45373, located in Troy. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4537337,714Troy
4535624,926Piqua
4537122,429Tipp City
453836,453West Milton
453185,210Covington
453592,120Pleasant Hill
453371,736Laura
453261,282Fletcher
453391,101Ludlow Falls
45312947Casstown
45361381Potsdam

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