Thomaston is a village in eastern Great Neck in the Town of North Hempstead in Nassau County, on the North Shore of Long Island, in New York, United States. The population was 2,617 at the 2010 census.

Great Neck is a region on Long Island, New York, that covers a peninsula on the North Shore and includes nine villages, among them Great Neck, Great Neck Estates, Great Neck Plaza, Kings Point, and Russell Gardens, and a number of unincorporated areas, as well as an area south of the peninsula near Lake Success and the border territory of Queens. The incorporated village of Great Neck had a population of 9,989 at the 2010 census, while the larger Great Neck area comprises a residential community of some 40,000 people in nine villages and hamlets in the town of North Hempstead, of which Great Neck is the northwestern quadrant. Great Neck has five ZIP Codes (11020–11024), which are united by a park district, one library district, and one school district.