U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
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State directory

Tennessee ZIP Codes

Complete postal directory, details, and geographic map for the State of Tennessee.

State ZIP Code City County Area Codes
TN 37684 Mountain Home Washington County 423
TN 37686 Piney Flats Sullivan County 423
TN 37687 Roan Mountain Carter County 423, 828
TN 37688 Shady Valley Johnson County 276, 423
TN 37690 Telford Washington County 423
TN 37691 Trade Johnson County 336, 423, 743, 828
TN 37692 Unicoi Unicoi County 423, 828
TN 37694 Watauga Carter County 423
TN 37699 Piney Flats Sullivan County 423
TN 37701 Alcoa Blount County 865
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Geographic Map of Tennessee

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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.