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 57047 Monroe Turner County 605
SD 57048 Montrose McCook County 605
SD 57049 North Sioux City Union County 402, 531, 605, 712
SD 57050 Nunda Lake County 605
SD 57051 Oldham Kingsbury County 605
SD 57052 Olivet Hutchinson County 605
SD 57053 Parker Turner County 605
SD 57054 Ramona Lake County 605
SD 57055 Renner Minnehaha County 605
SD 57056 Rowena Minnehaha 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.