Atco is an unincorporated community and census-designated place (CDP) in Waterford Township in Camden County, in the U.S. state of New Jersey. It is part of the Philadelphia-Camden metropolitan area, located 16 miles (26 km) southeast of Camden. Though generally considered part of Waterford Township, a small section of the southern edge of Atco is located in Winslow Township.

The Diocese of Camden s is a Latin Church diocese of the Catholic Church in the U.S. state of New Jersey. It consists of 62 parishes and about 475,000 Catholics in the South Jersey counties of Atlantic, Camden, Cape May, Cumberland, Gloucester, and Salem.