Waterboro is a town in York County, Maine, United States. The population was 6,214 at the 2000 census. It is part of the Portland–South Portland–Biddeford, Maine Metropolitan Statistical Area. The town includes the districts of North(04061), South(04087), and East(04030) Waterboro, in addition to the largest development in Southern Maine, Lake Arrowhead Community, which comprises one third of Waterboro's population.