Buffalo County, South Dakota

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Buffalo County is a county located in the U.S. state of South Dakota. As of 2000, the population is 2,032. Its county seat is Gann Valley[1], which is also the center of population of South Dakota,[2] though Gann Valley is an unincorporated community. The county's per-capita income makes it the poorest county in the United States[3]. The Crow Creek Indian Reservation inhabited by the Crow Creek Sioux Tribe makes up the majority of Buffalo County. Unemployment is 57%; many homes lack either kitchens or indoor plumbing.[4]



According to the U.S. Census Bureau, the county has a total area of 487 square miles (1,261.3 km2), of which 471 square miles (1,219.9 km2) is land and 17 square miles (44.0 km2) is water.


The county is divided into one township: Elvira; and three areas of unorganized territory: Crow Creek, North Buffalo, and Southeast Buffalo.

Major Highways

Adjacent Counties

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