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 57709 Rapid City Pennington County 605
SD 57714 Allen Bennett County 605
SD 57716 Batesland Oglala Lakota County 308, 402, 531, 605
SD 57717 Belle Fourche Butte County 307, 406, 605
SD 57718 Black Hawk Meade County 605
SD 57719 Box Elder Pennington County 605
SD 57720 Buffalo Harding County 605, 701
SD 57722 Buffalo Gap Custer County 605
SD 57724 Camp Crook Harding County 406, 605, 701
SD 57725 Caputa 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.