- Long Island stretches eastward from New York City in the Metro New York region. The island is approximately 115 mi (185 km) long from Brooklyn and Queens at the western end, to Montauk at the easternmost point. At its widest, the island is about 20 mi (32 km) from north to south. While Long Island geographically includes the New York City boroughs of Brooklyn and Queens, and the more suburban counties of Nassau and Suffolk, colloquially the term is often applied only to Nassau and Suffolk counties in New York State.