There are 9 zip codes in Ross County, Ohio. The most populated is 45601, located in Chillicothe. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
45601Chillicothe56,300
45628Frankfort5,434
45612Bainbridge4,622
45644Kingston4,525
43115Clarksburg1,943
45681South Salem1,480
45673Richmond Dale423
43101Adelphi365
45617Bourneville0

Ross County, Ohio Zip Codes by Population (2024)