Charles Eli Mix

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Charles Eli Mix (February 4, 1810–January 15, 1878)[1] was an American civil servant. He served as Chief Clerk of the Bureau of Indian Affairs from 1838 to 1868. For a brief period in 1858, Mix was Commissioner of the Bureau of Indian Affairs. During his time as Commissioner, he oversaw the signing of a treaty with the Yankton Sioux Tribe of the Dakota Territory (present-day South Dakota). The Treaty of Washington was signed on April 19, 1858 and ratified by the United States Senate on February 16, 1859. Charles Mix County, South Dakota, organized in 1862, is named after him.[2]

Charles Mix was born in New Haven, Connecticut and married Catherine Susan Upperman on August 16, 1829. He is interred at Oak Hill Cemetery in the Georgetown neighborhood of Washington, D.C., along with his wife and children.[1]


  1. ^ a b "Burial Records Index -- M" (PDF). Oak Hill Cemetery. Retrieved 2010-06-04. 
  2. ^ "Charles Mix County". About South Dakota: County of the Month. Office of U.S. Senator Tim Johnson (SD). Retrieved 2010-06-04.