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 57258 Raymond Clark County 605
SD 57259 Revillo Grant County 320, 605
SD 57260 Rosholt Roberts County 218, 320, 605, 701
SD 57261 Roslyn Day County 605
SD 57262 Sisseton Roberts County 605
SD 57263 South Shore Codington County 605
SD 57264 Stockholm Grant County 605
SD 57265 Strandburg Grant County 605
SD 57266 Summit Roberts County 605
SD 57268 Toronto Deuel 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.