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	57429	Brentford	Spink County	`605`
SD	57430	Britton	Marshall County	`605, 701`
SD	57432	Claremont	Brown County	`605`
SD	57433	Columbia	Brown County	`605`
SD	57434	Conde	Spink County	`605`
SD	57435	Cresbard	Faulk County	`605`
SD	57436	Doland	Spink County	`605`
SD	57437	Eureka	McPherson County	`605, 701`
SD	57438	Faulkton	Faulk County	`605`
SD	57439	Ferney	Brown 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.