Pennington County, South Dakota Basics:
Pennington County South Dakota - Government Site
Population: 104,363
Area: 2777 square miles
County seat: Rapid City
Area code(s) in use: 605
Time zone: MST
High school graduate or higher: 91.2%
Bachelor's degree or higher: 27.8%
Median household income: $50,253
Persons in poverty: 13.2%
Home ownership rate: 65.4%
Mean travel time to work: 17.8 minutes
Adjacent counties:
Crook (WY) Custer Haakon Jackson Lawrence Meade Shannon Weston (WY) Ziebach