Pennington County

Pennington County

County in South Dakota

  • Photos
  • Area
    7211
  • Population
    110,141 (2017)
  • County seat
    Rapid City
  • Points of interest
    Mount Rushmore National Memorial
  • Colleges and Universities
    South Dakota School of Mines & Technology
Pennington County Profiles
  • About

    Pennington County is a county in the U. S. state of South Dakota. As of the 2010 United States Census, the population was 100,948, making it the second-most populous county in South Dakota. Its county seat is Rapid City. The county was created in 1875, and was organized in 1877.

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