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 57776 Redig Harding County 605
SD 57779 Saint Onge Lawrence County 605
SD 57780 Scenic Pennington County 605
SD 57782 Smithwick Fall River County 605
SD 57783 Spearfish Lawrence County 307, 605
SD 57785 Sturgis Meade County 605
SD 57787 Union Center Meade County 605
SD 57788 Vale Butte County 605
SD 57790 Wall Pennington County 605
SD 57791 Wasta Pennington County 605
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Geographic Map of South Dakota

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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.