There are 8 zip codes in Defiance County, Ohio. The most populated is 43512, located in Defiance. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4351228,435Defiance
435265,559Hicksville
435561,682Sherwood
435491,353Ney
43519378Evansport
43536216Mark Center
4352017Farmer
435300Jewell

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