Hardin County, Ohio ZIP Codes

10 ZIP Codes

Zip Code
City
Population ↓
43326Kenton12,573
45810Ada7,449
45843Forest4,184
43310Belle Center3,177
43340Mount Victory2,103
45812Alger2,027
45836Dunkirk1,573
45835Dola449
45859McGuffey384
43346Roundhead238

Overview of ZIP Codes in Hardin County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
10
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 10 ZCTAs in Hardin County, Ohio (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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