Seven Mile Island or Seven Mile Beach is the name of a barrier island on the Jersey Shore in Cape May County, New Jersey, United States. It is divided between the boroughs of Avalon to the north, from 6th to 80th Streets, and Stone Harbor to the south, from 80th Street to Hereford Inlet.
The island is 7+1⁄2 miles (12 kilometers) long, and is three to four blocks wide. Known as Leaming's Island in 1722, when the first purchase of its 2,725 acres (1,103 hectares) was recorded, its dunes, woodlands and beaches were purchased for the equivalent of $380.[citation needed]