Island Beach was a borough that existed in Ocean County, New Jersey, United States, from 1933 to 1965.
Island Beach was incorporated as a borough by an Act of the New Jersey Legislature on June 23, 1933, from portions of Berkeley Township, Lacey Township and Ocean Township. The referendum that approved the borough's formation was passed on August 18, 1933. Most of the land that made up the new borough — 2,694 acres (10.90 km2) worth — had been purchased by Henry Phipps, a partner of Andrew Carnegie, in 1926. Phipps had hired Francis Parkman Freeman to act as foreman of the Island Beach estate, and Freeman and his wife Augusta Huiell Seaman shared the various local government positions between them.
The population reached a peak of 31 in the 1940 Census, and following a government-ordered evacuation during World War II the population had dropped off to 13 by 1950 and was down to 11 in the 1960 tally, the last before the borough was disincorporated.
The borough lasted until July 6, 1965, when it was absorbed into Berkeley Township. The territory now comprises Island Beach State Park.
Coordinates: 39°50′36″N 74°05′19″W / 39.8434°N 74.0887°W