State: South Dakota
County: Pennington County
Close cities: Fairburn, SD, Hill City, SD, Colonial Pine Hills, SD, Custer, SD, Custer, SD, Rapid City, SD, Deadwood, SD, Aurora, SD, Black Hawk, SD, Hermosa, SD, Hermosa, SD
Keystone Population (census data)| Total | 315 (+1.9% since 2000) |
| Male | 148 (47.0%) |
| Female | 167 (53.0%) |
Population Density: 110 people per sq. mile
Cost of Living Index: 79.2 (US Avg is 100)
Keystone Elevation: 4,323 feet above sea level
Land Area: 2.86 square miles
Median Household Income: $30,703
Zip Codes:
57751.