Dewey County, South Dakota
| Dewey County, South Dakota | |
|---|---|
 Location in the U.S. state of South Dakota |
|
 South Dakota's location in the U.S. |
|
| Founded | 1910 |
| Named for | William P. Dewey |
| Seat | Timber Lake |
| Largest community | North Eagle Butte |
| Area | |
| • Total | 2,445 sq mi (6,333 km2) |
| • Land | 2,302 sq mi (5,962 km2) |
| • Water | 143 sq mi (370 km2), 5.8% |
| Population (est.) | |
| • (2015) | 5,685 |
| • Density | 2.3/sq mi (1/km²) |
| Congressional district | At-large |
| Time zone | Mountain: UTC-7/-6 |
Dewey County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 5,301. Its county seat is Timber Lake. 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.
According to the U.S. Census Bureau, the county has a total area of 2,445 square miles (6,330 km2), of which 2,302 square miles (5,960 km2) is land and 143 square miles (370 km2) (5.8%) is water.
As of the census of 2000, there were 5,972 people, 1,863 households, and 1,386 families residing in the county. The population density was 3 people per square mile (1/km²). There were 2,133 housing units at an average density of 1 per square mile (0/km²). The racial makeup of the county was 74.16% Native American, 24.15% White, 0.03% Black or African American, 0.12% Asian, 0.05% Pacific Islander, 0.07% from other races, and 1.42% from two or more races. 0.85% of the population were Hispanic or Latino of any race. 14.2% were of German ancestry according to Census 2000. 84.6% spoke English and 14.4% Dakota as their first language.
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