There are 5 zip codes in Loudon County, Tennessee. The most populated is 37774, located in Loudon. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
3777419,713Loudon
3777117,802Lenoir City
3777213,597Lenoir City
377426,600Greenback
378464,374Philadelphia

Zip Codes in Loudon County, Tennessee by Population (2024)