New York City worldwide. New York City is situated in the Northeastern United States, in southeastern New York State, approximately halfway between Washington, D.C. and Boston. The location at the mouth of the Hudson River, which feeds into a naturally sheltered harbor and then into the Atlantic Ocean, has helped the city grow in significance as a trading port. Most of New York City is built on the three islands of Long Island, Manhattan, and Staten Island. The Hudson River flows through the Hudson Valley into New York Bay. Between New York City and Troy, New York, the river is an estuary. The
Southport, New York area of , of which is land and , or 0.91%, is water. The south town line is the border of Pennsylvania, and the west town line is the border of Steuben County, New York. The Chemung River, a tributary of the Susquehanna River, forms part of the northern border. New York State Route 14 and New York State Route 328 are north-south highways that intersect in Southport village. As of the census of 2000, there were 11,185 people, 4,189 households, and 2,890 families residing in the town. The population density was 240.4 people per square mile (92.8/km²). There were