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	57337	Fedora	Miner County	`605`
SD	57339	Fort Thompson	Buffalo County	`605`
SD	57340	Fulton	Hanson County	`605`
SD	57341	Gann Valley	Buffalo County	`605`
SD	57342	Geddes	Charles Mix County	`605`
SD	57344	Harrison	Douglas County	`605`
SD	57345	Highmore	Hyde County	`605`
SD	57346	Stephan	Hyde County	`605`
SD	57348	Hitchcock	Beadle County	`605`
SD	57349	Howard	Miner County	`605`

Page 18 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.