South Dakota Counties
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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

Todd County, South Dakota

Todd County Education, Geography, and History

Todd County, South Dakota Landscape

Todd County is a county located in the state of South Dakota. Based on the 2010 census, the population was 9,612. Todd County does not have its own county seat. Instead, Winner in neighboring Tripp County serves as its administrative center. Its largest city is Mission. The county was created in 1909, although it remains unorganized. The county was named by European-American settlers after John Blair Smith Todd, who was a delegate from Dakota Territory to the United States House of Representatives and a general in the Union Army during the American Civil War.

The county lies entirely within the Rosebud Indian Reservation and is coterminous with the main reservation (exclusive of off-reservation trust lands, which lie in four nearby counties). Its southern border is with the state of Nebraska. It is one of five South Dakota counties entirely within an Indian reservation.

Etymology - Origin of Todd County Name

Todd is named for John Blair Smith Todd, the first Congressional Delegate from Dakota Territory.


County QuickFacts: CensusBureau Quick Facts

Todd County History

Todd County was created in 1909 and organized in December of 1981. A Home Rule Charter was signed January 1, 1983. The county was named for John Blair Smith Todd, who was the first delegate to Congress from Dakota Territory. The county contracts with Tripp County for the duties of Auditor, Treasurer and Register of Deeds.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 1,391 square miles (3,602 km2), of which, 1,388 square miles (3,595 km2) of it is land and 3 square miles (7 km2) of it (0.20%) is water.

Neighboring Counties

Bordering counties are as follows:

  • Mellette County, South Dakota - north
  • Tripp County, South Dakota - east
  • Cherry County, Nebraska - south
  • Bennett County, South Dakota - west


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