There are 8 zip codes in DeKalb County, Indiana. The most populated is 46706, located in Auburn. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
46706Auburn20,000
46738Garrett8,339
46721Butler4,856
46793Waterloo4,281
46788Spencerville4,099
46705Ashley1,936
46785Saint Joe1,732
46730Corunna1,007

DeKalb County, Indiana Zip Codes by Population (2024)