Manor St. George or St. George's Manor was a large tract of land purchased by William "Tangier" Smith in the 17th century on Long Island, in central Suffolk County, New York. Parts of the original parcel, which was approximately 64,000 acres (260 km2) of land, are preserved in bits and pieces: 127 acres (0.51 km2) and the main house and buildings are called the Manor of St. George and located in Shirley; 35 acres (0.14 km2) and another house are called the Longwood Estate and located in Ridge; and 35 acres (0.14 km2) became part of the William Floyd Estate.