South Dakota, United States·76K residents
Rapid City is a city in and the county seat of Pennington County, South Dakota, United States. The population was 74,703 as of the 2020 census, and was estimated at 80,589 in 2025, making it the second-most populous city in South Dakota, after Sioux Falls. The Rapid City metropolitan area has 156,934 residents in 2025.
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