Oyster Bay, uninc. area (1990 pop. 6,687) of the Town of Oyster Bay, Nassau co., SE N.Y., on N Long Island, on Long Island Sound; settled 1653. It is chiefly residential. Nearby is Theodore Roosevelt's estate, "Sagamore Hill," which was made a national shrine in 1953 and a national historic site in 1963. Also of interest in Oyster Bay are several 18th-century homes and the Theodore Roosevelt memorial bird sanctuary (owned by the National Audubon Society), which adjoins Roosevelt's grave.