Charles Mix County | |
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Charles Mix County Courthouse in Lake Andes | |
![]() Location within the U.S. state of South Dakota | |
![]() South Dakota's location within the U.S. | |
Coordinates: 43°13′N 98°35′W / 43.21°N 98.59°W | |
Country | ![]() |
State | ![]() |
Founded | 1862 (created) 1879 (organized) |
Named for | Charles Eli Mix |
Seat | Lake Andes |
Largest city | Wagner |
Area | |
• Total | 1,150 sq mi (3,000 km2) |
• Land | 1,097 sq mi (2,840 km2) |
• Water | 53 sq mi (140 km2) 4.6% |
Population (2020) | |
• Total | 9,373 |
• Estimate (2023) | 9,240 ![]() |
• Density | 8.2/sq mi (3.1/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional district | At-large |
Website | charlesmix |
Charles Mix County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 9,373.[1] Its county seat is Lake Andes.[2] The county was created in 1862 and organized in 1879.[3] It was named for Charles Eli Mix, an official of the Bureau of Indian Affairs influential in signing a peace treaty with the local Lakota Indian tribes.[4] The easternmost approximately 60% of the county comprises the Yankton Indian Reservation.
The Papineau Trading Post, whose building is now in Geddes, South Dakota, was an early county seat.[5] Geddes tried to wrest the county seat from Wheeler in 1900, 1904, and 1908.[6] The Charles Mix County Courthouse in Lake Andes was built in 1918.[6]