Gann Valley, South Dakota
|Elevation||1,604 ft (489 m)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
Gann Valley is an unincorporated community in, and the county seat of, Buffalo County, South Dakota, United States. The town had a population of 14 as of the 2010 census. It is the smallest unincorporated county seat in the United States.
The community was founded in 1885 by Herst Gann in a valley on Crow Creek just east of the Crow Creek Reservation. 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.
Its ZIP code is 57341.
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.
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- Federal Writers' Project (1940). South Dakota place-names, v.1-3. University of South Dakota. p. 38.
- "Population and Population Centers by State - 2000". United States Census Bureau. Archived from the original on 2013-06-22. Retrieved 2008-02-25.
- "July, 2006 Record Heat". National Weather Service Weather Forecast Office. Retrieved 2012-10-23.
- Climate Summary for Gann Valley, South Dakota