Rock Hill is the largest city in York County, South Carolina, United States, and the fourth largest city in the state. The 2008 population estimate was 67,339 residents. Rock Hill is located at 34°56′17″N 81°1′34″W / 34.93806°N 81.02611°W / 34.93806; -81.02611, approximately 15 miles south of Charlotte, North Carolina and approximately 70 miles north of Columbia.