Berkeley County is a county in the U.S. state of South Carolina. As of the 2010 census, its population was 177,843. Its county seat is Moncks Corner. After two previous incarnations of Berkeley County, the current county was created in 1882.Berkeley County is included in the Charleston-North Charleston, SC Metropolitan Statistical Area.HistoryBerkeley County was established in 1682. It was named after John and William Berkeley, co-owners of the Province of Carolina. It became part of the Charleston District in 1769. It did not exist as a District during most of the 19th century and generally was part of the Low Country culture. In 1882, following white Democrats regaining control of the state legislature after the Reconstruction era, they established this as a county in 1882, with its seat at Mount Pleasant. The county seat was moved in 1895 to Moncks Corner.The Old Berkeley County Courthouse was listed on the National Register of Historic Places in 1971.