DeKalb County, Indiana ZIP Codes

Zip Code
City
Population ↓
46706Auburn20,403
46738Garrett8,533
46721Butler4,739
46788Spencerville4,373
46793Waterloo4,104
46705Ashley1,972
46785Saint Joe1,491
46730Corunna1,299

Overview of ZIP Codes in DeKalb 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 DeKalb County, Indiana (US Census).

Sources

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

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