Ellendale is a town in Sussex County, Delaware, United States. The population was 327 at the 2000 census. It is part of the Seaford, Delaware Micropolitan Statistical Area. Ellendale is the "Gateway to Delaware's Resort Beaches" because it is the city located on U.S. Highway 113, the resort area's western most border, and Delaware Route 16, the resort area's northern most border with the eastern border being the Delaware Bay and Atlantic Ocean and the southern border being the state line with Maryland. Ellendale is home to the Philadelphia Bible College and the Harbor Christian Academy.