Following the 2010 census, the area was delineated as two CDPs: Gilgo and Oak Beach–Captree. The original CDP contained several small beach communities on a barrier island along the southern edge of Long Island. In order from west to east, these included West Gilgo Beach (on the Nassau/Suffolk county border), Gilgo Beach, Cedar Beach (no residences), Oak Beach (including the Oak Island Beach Association), Oak Island and Captree Island. They are connected to the mainland by Ocean Parkway from the west and Robert Moses State Parkway from the north.
Following the 2010 census, the area was delineated as two CDPs: Gilgo and Oak Beach–Captree. The original CDP contained several small beach communities on a barrier island along the southern edge of Long Island. In order from west to east, these included West Gilgo Beach (on the Nassau/Suffolk county border), Gilgo Beach, Cedar Beach (no residences), Oak Beach (including the Oak Island Beach Association), Oak Island and Captree Island. T.hey are connected to the mainland by Ocean Parkway from the west and Robert Mose!s State Parkway from the north.