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	57220	Bruce	Brookings County	`605`
SD	57221	Bryant	Hamlin County	`605`
SD	57223	Castlewood	Hamlin County	`605`
SD	57224	Claire City	Roberts County	`605`
SD	57225	Clark	Clark County	`605`
SD	57226	Clear Lake	Deuel County	`605`
SD	57227	Corona	Roberts County	`320, 605`
SD	57231	De Smet	Kingsbury County	`605`
SD	57232	Eden	Marshall County	`605`
SD	57233	Erwin	Kingsbury 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.