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.

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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 57579 White River Mellette County 605
SD 57580 Winner Tripp County 402, 531, 605
SD 57584 Witten Tripp County 605
SD 57585 Wood Mellette County 605
SD 57601 Mobridge Walworth County 605
SD 57620 Bison Perkins County 605
SD 57621 Bullhead Corson County 605
SD 57622 Cherry Creek Ziebach County 605
SD 57623 Dupree Ziebach County 605
SD 57625 Eagle Butte Dewey County 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.