Ridge is a hamlet and census-designated place (CDP) in the town of Brookhaven, Suffolk County, New York, United States.

[2] In 1693, William "Tangier" Smith, who owned a homestead in Setauket, was allowed to purchase a large tract of land on the South Shore of Long Island in recognition of his being mayor of Tangier in Africa.

The land, called Manor St. George, stretched from the Carmans River (then called the Connecticut River) in the west to the edge of the town of Southampton in the east, with a northern border around present-day New York State Route 25, as much as 81,000 acres (330 km2) of land.

Longwood's 750 acres (300 ha) fell into the hands of Elbert Clayton Smith, who immediately moved his family from California to live there.

He seems to have been very generous to his new community; his donations included 51 acres (21 ha) to the school board for the construction of Longwood High School and 6 acres (2.4 ha) to Middle Island Presbyterian Church.

[3] In 1738, northern Ridge was settled by widower Samuel Randall of North Stonington, Connecticut; his only son Stephen Randall and his descendants farmed a 4,000-acre (1,600 ha) plot of ground that Samuel had always referred to as "the Ridge" based on the geographical terrain.

The Randall burial plot near the William Floyd Parkway includes the grave of Lt. Stephen Randall (1736–1818), patriot of the American Revolution and a Suffolk County Militia veteran of the Battle of Long Island.