Gann Valley is a census-designated place in and the county seat of Buffalo County, South Dakota, United States.[4] The town had a population of 14 as of the 2010 census. It is the smallest unincorporated county seat in the United States.[5]
Gann Valley | |
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Unincorporated community | |
![]() ![]() Gann Valley Location within the state of South Dakota Show map of South Dakota![]() ![]() Gann Valley Gann Valley (the United States) Show map of the United States | |
Coordinates: 44°2′0″N 98°59′15″W | |
Country | United States |
State | South Dakota |
County | Buffalo |
Founded | 1885 |
Area | |
• Total | 0.08 sq mi (0.21 km2) |
• Land | 0.08 sq mi (0.21 km2) |
• Water | 0.00 sq mi (0.00 km2) |
Elevation | 1,604 ft (489 m) |
Population (2020)[2] | |
• Total | 10 |
• Density | 126.58/sq mi (48.68/km2) |
Time zone | UTC-6 (Central (CST)) |
• Summer (DST) | UTC-5 (CDT) |
ZIP codes | 57341 |
Area code | 605 |
FIPS code | 46-23421 |
GNIS feature ID | 2584554[3] |
Website | http://www.gannvalley.com/ |
Historical population | |||
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Census | Pop. | %± | |
2020 | 10 | — | |
U.S. Decennial Census[6] |
The community was founded in 1885 by Herst Gann in a valley on Crow Creek just east of the Crow Creek Reservation.[7][8] Gann donated the courthouse in the community and A.L. Spencer donated 30 acres resulting in the community becoming the county seat. In 1886 the county seat was moved to Buffalo Center but was moved back to Gann in 1888.[9]
Its ZIP code is 57341.
The center of population of South Dakota is located in Gann Valley.[10] Gann Valley holds the record for the hottest temperature in South Dakota (120 °F [49 °C]).[11]
This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Gann Valley has a humid continental climate, abbreviated "Dfa" on climate maps.[12]
Municipalities and communities of Buffalo County, South Dakota, United States | ||
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County seat: Gann Valley | ||
CDPs | ![]() | |
Township |
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Unorganized territories |
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Indian reservation | ||
Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
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