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	57548	Lower Brule	Lyman County	`605`
SD	57551	Martin	Bennett County	`402, 531, 605`
SD	57552	Midland	Haakon County	`605`
SD	57553	Milesville	Haakon County	`605`
SD	57555	Mission	Todd County	`605`
SD	57559	Murdo	Jones County	`605`
SD	57560	Norris	Mellette County	`605`
SD	57562	Okaton	Jones County	`605`
SD	57563	Okreek	Todd County	`605`
SD	57564	Onida	Sully 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.