There are 4 zip codes in DeKalb County, Tennessee. The most populated is 37166, located in Smithville. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
37166Smithville14,051
37012Alexandria2,340
37095Liberty2,279
37059Dowelltown1,588

DeKalb County, Tennessee Zip Codes by Population (2024)