Dewey County | |
|---|---|
 | |
 Location within the U.S. state of South Dakota | |
 South Dakota's location within the U.S. | |
| Coordinates: 45°10′N 100°53′W / 45.16°N 100.88°W | |
| Country |  United States |
| State |  South Dakota |
| Founded | 1883 (created) 1910 (organized) |
| Named for | William P. Dewey |
| Seat | Timber Lake |
| Largest community | North Eagle Butte |
| Area | |
• Total | 2,445 sq mi (6,330 km2) |
| • Land | 2,302 sq mi (5,960 km2) |
| • Water | 143 sq mi (370 km2) 5.8% |
| Population (2020) | |
• Total | 5,239 |
• Estimate (2023) | 5,208  |
| • Density | 2.1/sq mi (0.83/km2) |
| Time zone | UTC−7 (Mountain) |
| • Summer (DST) | UTC−6 (MDT) |
| Congressional district | At-large |
Dewey County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 5,239.[1] Its county seat is Timber Lake.[2] The county was created in 1883 and organized in 1910.[3] It was named for William P. Dewey,[4] 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.
- ^ "State & County QuickFacts". United States Census Bureau. Retrieved March 21, 2024.
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- ^ "Dakota Territory, South Dakota, and North Dakota: Individual County Chronologies". Dakota Territory Atlas of Historical County Boundaries. The Newberry Library. 2006. Archived from the original on April 2, 2018. Retrieved March 29, 2015.
- ^ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 105.