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
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State directory

South Dakota ZIP Codes

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

State ZIP Code City County Area Codes
SD 57324 Cavour Beadle County 605
SD 57325 Chamberlain Brule County 605
SD 57326 Chamberlain Brule County 605
SD 57328 Corsica Douglas County 605
SD 57329 Dante Charles Mix County 605
SD 57330 Delmont Douglas County 605
SD 57331 Dimock Hutchinson County 605
SD 57332 Emery Hanson County 605
SD 57334 Ethan Davison County 605
SD 57335 Fairfax Gregory County 402, 531, 605
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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.