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 57364 New Holland Douglas County 605
SD 57365 Oacoma Lyman County 605
SD 57366 Parkston Hutchinson County 605
SD 57367 Pickstown Charles Mix County 605
SD 57368 Plankinton Aurora County 605
SD 57369 Platte Charles Mix County 605
SD 57370 Pukwana Brule County 605
SD 57371 Ree Heights Hand County 605
SD 57373 Saint Lawrence Hand County 605
SD 57374 Spencer McCook 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.