Silver City is an unincorporated community in Pennington County, South Dakota, United States, outside Rapid City. It lies at the head of Pactola Lake on Rapid Creek, and is about 5 miles west of U.S. Route 385 via a paved county road. It is not tracked by the U.S. Census Bureau.

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. Its county seat is Rapid City. The county was created in 1875, and was organized in 1877. It is named for John L. Pennington, fifth Governor of Dakota Territory, who held office in 1875 when the county was formed.