Gann Valley, South Dakota

Gann Valley
Gann Valley
Location within the state of South Dakota
Gann Valley
Gann Valley (the United States)
Coordinates: 44°02′01″N 98°59′18″W / 44.03361°N 98.98833°W / 44.03361; -98.98833
CountryUnited States
StateSouth Dakota
CountyBuffalo
Founded1885
Area
 • Total
0.081 sq mi (0.21 km2)
 • Land0.081 sq mi (0.21 km2)
 • Water0 sq mi (0.00 km2)
Elevation
1,716 ft (523 m)
Population
 (2020)
 • Total
10
 • Density126.1/sq mi (48.68/km2)
Time zoneUTC-6 (Central (CST))
 • Summer (DST)UTC-5 (CDT)
ZIP codes
57341
Area code605
FIPS code46-23421
GNIS feature ID2584554
Websitehttp://www.gannvalley.com/

Gann Valley is a census-designated place in and the county seat of Buffalo County, South Dakota, United States. The town had a population of 10 as of the 2020 census. It is the smallest unincorporated county seat in the United States.