There are 9 zip codes in Harrison County, Ohio. The most populated is 43907, located in Cadiz. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
439074,978Cadiz
439732,415Freeport
439882,326Scio
439861,783Jewett
439761,669Hopedale
44699704Tippecanoe
43981208New Athens
4397488Harrisville
4469342Deersville

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