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 57656 Timber Lake Dewey County 605
SD 57657 Trail City Corson County 605
SD 57658 Wakpala Corson County 605
SD 57659 Walker Corson County 605, 701
SD 57660 Watauga Corson County 605, 701
SD 57661 Whitehorse Dewey County 605
SD 57701 Rapid City Pennington County 605
SD 57702 Rapid City Pennington County 605
SD 57703 Rapid City Pennington County 605
SD 57706 Ellsworth AFB Meade 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.