The Roman Catholic Diocese of Charlotte (Dioecesis Carolinana), is a diocese of the Roman Catholic Church in the southern United States. It is made up of 46 counties in western North Carolina, which are divided into ten vicariates, named for and administered from Albemarle, Asheville, Boone, Gastonia, Greensboro, Hickory, Mecklenburg, Salisbury, Smoky Mountain and Winston-Salem. Charlotte and the Piedmont Triad are the largest metropolitan areas in the diocese.