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 57750 Interior Jackson County 605
SD 57751 Keystone Pennington County 605
SD 57752 Kyle Oglala Lakota County 605
SD 57754 Lead Lawrence County 307, 605
SD 57755 Ludlow Harding County 605, 701
SD 57756 Manderson Oglala Lakota County 605
SD 57758 Mud Butte Meade County 605
SD 57759 Nemo Lawrence County 605
SD 57760 Newell Butte County 605
SD 57761 New Underwood Pennington 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.