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

All states and U.S. territories

Maps and coordinates

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	57269	Twin Brooks	Grant County	`605`
SD	57270	Veblen	Marshall County	`605, 701`
SD	57271	Vienna	Clark County	`605`
SD	57272	Wallace	Codington County	`605`
SD	57273	Waubay	Day County	`605`
SD	57274	Webster	Day County	`605`
SD	57276	White	Brookings County	`605`
SD	57278	Willow Lake	Clark County	`605`
SD	57279	Wilmot	Roberts County	`320, 605`
SD	57301	Mitchell	Davison County	`605`

Page 15 of 40

Geographic Map of South Dakota

Postal context

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.