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Dewey County, South Dakota

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Please add profiles of those who were born, lived or died in Dewey County, South Dakota.

The county was created in 1883 and organized in 1910. It was named for William P. Dewey, Territorial surveyor-general from 1873 to 1877.

Almost the entire county lies in the Cheyenne River Indian Reservation. The balance of the county, along its extreme northern county line, lies in the Standing Rock Indian Reservation. It is one of five South Dakota counties that are contained within Indian reservations.

Adjacent Counties

Cities, Towns & Communities

  • Bear Creek
  • Eagle Butte (part)
  • Firesteel
  • Glencross
  • Green Grass
  • Isabel
  • La Plant
  • Lantry
  • North Eagle Butte
  • Parade
  • Promise
  • Ridgeview
  • Timber Lake (County Seat)
  • Whitehorse



Genealogy Trails


Dakota Club Library

Vanished SD: Dewey