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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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 57026 Elkton Brookings County 507, 605
SD 57027 Fairview Lincoln County 605, 712
SD 57028 Flandreau Moody County 507, 605
SD 57029 Freeman Hutchinson County 605
SD 57030 Garretson Minnehaha County 507, 605
SD 57031 Gayville Yankton County 402, 531, 605
SD 57032 Harrisburg Lincoln County 605, 712
SD 57033 Hartford Minnehaha County 605
SD 57034 Hudson Lincoln County 605, 712
SD 57035 Humboldt Minnehaha 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.