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Pennington County, South Dakota

US county information
NamePennington County
StateSouth Dakota
SeatRapid City
Largest cityRapid City
US Area
Total Area2784 sq mi (7210.6 km2)
Land Area2776 sq mi (7189.8 km2)
Water Area8 sq mi (20.7 km2)
Population100948 (2010)
Density14/km2 (36.22/sq mi)
Named forJohn L. Pennington
Time zoneMountain
Time zoneMountain: UTC-7/-6: −7/−6

     Home | County | Pennington County South Dakota

Pennington County is a county located in the US state of South Dakota. As of the 2010 census, the population was 100,948.

Its county seat is at Rapid City. Pennington County is the primary county for the Rapid City, South Dakota, Metropolitan Statistical Area. It is also the location of the Mount Rushmore National Memorial

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