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	57454	Langford	Marshall County	`605`
SD	57455	Lebanon	Potter County	`605`
SD	57456	Leola	McPherson County	`605`
SD	57457	Long Lake	McPherson County	`605, 701`
SD	57460	Mansfield	Brown County	`605`
SD	57461	Mellette	Spink County	`605`
SD	57465	Northville	Spink County	`605`
SD	57466	Onaka	Faulk County	`605`
SD	57467	Orient	Hand County	`605`
SD	57468	Pierpont	Day 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.