There are 13 zip codes in Putnam County, Ohio. The most populated is 45875, located in Ottawa. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4587511,052Ottawa
458305,608Columbus Grove
458565,245Leipsic
458313,601Continental
458442,878Fort Jennings
458772,348Pandora
458272,043Cloverdale
458531,553Kalida
45876960Ottoville
45893159Vaughnsville
45864156Miller City
4581594Belmore
4584892Glandorf

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