Knox County, Ohio ZIP Codes

8 ZIP Codes

Zip Code
City
Population ↓
43050Mount Vernon31,074
43019Fredericktown9,445
43028Howard7,799
43011Centerburg6,594
43014Danville3,738
43022Gambier3,635
43005Bladensburg339
43037Martinsburg293

Overview of ZIP Codes in Knox 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.
8
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 8 ZCTAs in Knox County, Ohio (US Census).

Sources

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

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