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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.

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Grainger County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Grainger County.

County State ZIP Code City Area Codes
Grainger County TN 37708 Bean Station 423, 865
Grainger County TN 37709 Blaine 865
Grainger County TN 37848 Powder Springs 865
Grainger County TN 37861 Rutledge 423, 865
Grainger County TN 37881 Thorn Hill 423, 865
Grainger County TN 37888 Washburn 423, 865

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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.