Riverhead is the seat of the county that dominates its eastern two-thirds, Suffolk.
Harbor Hill and Ronkonkoma are moraines which create the "spine" of this island. Riverhead is the seat of the county that dominates its eastern two-thirds, Suffolk. Another county, Nassau, lies immediately east of the two boroughs that provide over 90% of this island's population. Rockaway Beach sits on this island's southern shore, while Oyster Bay sits on its northern shore. Separated from Manhattan and the Bronx by the East River is, FTP, what island, home to Queens and Brooklyn.
Harbor Hill and Ronkonkoma are moraines which create the "spine" of this island.
{Long} Island