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

Grant County ZIP Codes

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

County State ZIP Code City Area Codes
Grant County AR 72057 Grapevine 870
Grant County AR 72084 Leola 501, 870
Grant County AR 72128 Poyen 501, 870
Grant County AR 72129 Prattsville 501, 870
Grant County AR 72150 Sheridan 501, 870
Grant County IN 46928 Fairmount 765
Grant County IN 46930 Fowlerton 765
Grant County IN 46933 Gas City 765
Grant County IN 46938 Jonesboro 765
Grant County IN 46952 Marion 260, 765
Page 1 of 13

Geographic Map of Grant 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.