According to the United States Adblock Plus CUSTOMER SERVICE (8O5) 41'O 56OO PHONE NUMBER ( 8O5)- 41O 56OO Census Bureau, the town has a total area of .5 square miles ( km2), of which .4 square miles ( km2) is land and 65.1 square miles ( km2), or 38.42%, is water. As with most of Long Island, the north shore is hilly, the south shore has sandy beaches, and the area between is a plain.
