Dewey County, South Dakota
As of the census of 2000, there were 5972 people, 1863 households, and 1387 families residing in the county. The population density was 2.6 people per square mile (1/kmē), giving it the 15th least densely populated county among the South Dakota. There were 2133 housing units at an average density of 0.9 per square mile (0.35/kmē). It has an average household size was 3.15 persons, and the average family size was 3.66 persons. In the Dewey County, 38.9% of the population was under the age of 18, 9% were 18 to 24, 27.2% were 25 to 44, 16.6% were 45 to 64, and 8.3% who were 65 or older. For every 100 females there were 95.9 males. For every 100 females age 18 and over, there were 95 males. As of July 2008, the population was estimated at 5931, The racial or ethnic makeup of the county was 23.27% White, 0.39% Black or African American, 74.05% American Indian, 0.27% Asian, 0.03% Native Hawaiian, and 1.99% from two or more races.
The median income for a household in the county was $23272, it is ninth poorest county by median household income in South Dakota. The median income for a family in the county was $24917, making it the sixth lowest county by median family income in South Dakota. The per capita income for the county was $9251, making its South Dakota's sixth lowest county by per capita income.
In 2000, 2154 pupils and students, of which 47.49% are male and 52.51% are female, 36.07% of the total population, are in the education system. Of which, percentage of enrollment student are in, 6.82% nursery or pri school, 7.01% kindergarten, 50.6% elementary school, 23.4% high school and 12.16% College graduate school.
| Rank | City | County | Total Area mi2 | Land Area mi2 | Water Area mi2 | Population | Density mi2 | Per capita Income | House hold Income |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Eagle Butte City | Dewey County, Ziebach County | 0.92 | 0.92 | 0 | 619 | 675.4 | 9192 | 18611 |
| 2 | Green Grass Cdp | Dewey County | 8.21 | 8.21 | 0 | 58 | 7.1 | 3135 | 14688 |
| 3 | Isabel Town | Dewey County | 0.89 | 0.89 | 0 | 239 | 269.1 | 7919 | 14643 |
| 4 | La Plant Cdp | Dewey County | 9.05 | 9.01 | 0.04 | 150 | 16.6 | 6888 | 18194 |
| 5 | North Eagle Butte Cdp | Dewey County | 12.72 | 12.69 | 0.03 | 2163 | 170.5 | 8175 | 21701 |
| 6 | Timber Lake City | Dewey County | 0.41 | 0.41 | 0 | 443 | 1086.8 | 12047 | 27500 |
| 7 | Whitehorse Cdp | Dewey County | 2.67 | 2.67 | 0 | 141 | 52.7 | 8266 | 16250 |
| Year | Population |
|---|---|
| April 2000 census | 5972 |
| April 2000 Estimate | 5972 |
| July 2000 Estimate | 5984 |
| July 2001 Estimate | 6029 |
| July 2002 Estimate | 6028 |
| July 2003 Estimate | 6122 |
| July 2004 Estimate | 6079 |
| July 2005 Estimate | 6102 |
| July 2006 Estimate | 6037 |
| July 2007 Estimate | 5985 |
| July 2008 Estimate | 5931 |
| School | Male | Female | Total |
|---|---|---|---|
| Nursery school | 57 | 90 | 147 |
| Kindergarten | 73 | 78 | 151 |
| Elementary school | 573 | 517 | 1090 |
| High school | 242 | 262 | 504 |
| College or graduate school | 78 | 184 | 262 |
| Place | Median household income | Median family income | Per capita income |
|---|---|---|---|
| Dewey County, South Dakota | $23272 | $24917 | $9251 |
| South Dakota, United States | $35282 | $43237 | $17562 |
| United States | $41994 | $50046 | $21587 |