Pennington County
| Use attributes for filter ! | |
| 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 |
| Date of Reg. | |
| Date of Upd. | |
| ID | 2296787 |
About Pennington County
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.
