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South Dakota Counties
South Dakota County map
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South Dakota Counties

There are sixty-six counties in the state of South Dakota. Todd County and Oglala Lakota County are the only counties in South Dakota which do not have their own county seats

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Sully County, South Dakota

Sully County Education, Geography, and History

Sully County, South Dakota Courthouse

Sully County is a county located in the state of South Dakota. Based on the 2010 census, the population was 1,373, making it the third-least populous county in South Dakota. Its county seat is Onida. The county was created in 1873 and organized in 1883. It is named after General Alfred Sully who built Fort Sully.

Sully County is included in the Pierre, SD Micropolitan Statistical Area.

Etymology - Origin of Sully County Name

Sully is named for Fort Sully, which is named in turn for is founder, officer Alfred Sully.

Demographics:

County QuickFacts: Census Bureau Quick Facts

Sully County History

Sully County, created in 1873 and organized in 1883, was named for Fort Sully, a Missouri River military post, and its builder and commander General Alfred Sully. The county seat is located at Onida. In 1884 an election was held between Onida, Clifton and Fairbank for the location of the county seat. Onida had the majority but the result was challenged in court. The judge ruled in favor of Onida.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 1,070 square miles (2,772 km2), of which, 1,007 square miles (2,608 km2) of it is land and 63 square miles (164 km2) of it (5.93%) is water.

Neighboring Counties

Bordering counties are as follows:

  • Potter County, South Dakota - north
  • Hyde County, South Dakota - east
  • Hughes County, South Dakota - south
  • Stanley County, South Dakota - southwest
  • Dewey County, South Dakota - northwest

Education

South Dakota Colleges, Universities, & Schools
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