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 57234 Estelline Hamlin County 605
SD 57235 Florence Codington County 605
SD 57236 Garden City Clark County 605
SD 57237 Gary Deuel County 320, 507, 605
SD 57238 Goodwin Deuel County 605
SD 57239 Grenville Day County 605
SD 57241 Hayti Hamlin County 605
SD 57242 Hazel Hamlin County 605
SD 57243 Henry Codington County 605
SD 57245 Kranzburg Codington 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.