Pennington County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 109,222, making it the second most populous county in South Dakota, and was estimated to be 1
Pennington County Courthouse in Rapid City
Extinct Mesohippus horse, found in Pennington County, on display at the Houston Museum of Natural Science
Rapid City, South Dakota
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Rapid City is a city in and the county seat of Pennington County, South Dakota, United States. It is located on the eastern slope of the Black Hills in western South Dakota and was named after Rapid C
Pennington County, South Dakota
…the population was 109,222, making it the second most populous county in South Dakota, and was estimated to be 116,792 in 2025. Its county seat is Rapid City. The county was created on January 11, 1875, and was organized on April 19, 1877. It is named for John L. Pennington, fifth Governor of Dakota Territory…
Rapid City Skyline
Journey Museum and Learning Center
Dahl Arts Center Rapid City
Dakota Mill and Grain facility in Rapid City, SD