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 57481 Westport Brown County 605
SD 57501 Pierre Hughes County 605
SD 57520 Agar Sully County 605
SD 57521 Belvidere Jackson County 605
SD 57522 Blunt Hughes County 605
SD 57523 Burke Gregory County 402, 531, 605
SD 57528 Colome Tripp County 402, 531, 605
SD 57529 Dallas Gregory County 402, 531, 605
SD 57531 Draper Jones County 605
SD 57532 Fort Pierre Stanley 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.