 Edgewater Park was incorporated as a township by an act of the New Jersey Legislature on February 26, 1924, from portions of Beverly Township (now known as Delanco Township).The township was named for its location along the Delaware River.According to the United States Census Bureau, the township had a total area of 3.040 square miles (7.873 km2), including 2.894 square miles (7.495 km2) of land and 0.146 square miles (0.377 km2) of water (4.79%).