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
Maps and coordinates
County directory

Hardin County ZIP Codes

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

County State ZIP Code City Area Codes
Hardin County OH 45836 Dunkirk 419, 567
Hardin County OH 45843 Forest 220, 419, 567, 740
Hardin County OH 45859 Mc Guffey 419, 567
Hardin County TN 38326 Counce 256, 662, 731, 938
Hardin County TN 38327 Crump 731
Hardin County TN 38361 Morris Chapel 731
Hardin County TN 38365 Pickwick Dam 731
Hardin County TN 38370 Saltillo 731
Hardin County TN 38372 Savannah 256, 731, 931, 938
Hardin County TN 38376 Shiloh 731
Page 5 of 6

Geographic Map of Hardin County

Postal context

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.