Roosevelt Island is a narrow island in New York City's East River, within the borough of Manhattan. It lies between Manhattan Island to its west and the borough of Queens, on Long Island, to its east. Running from the equivalent of East 46th to 85th Streets on Manhattan Island, it is about 2 miles long, with a maximum width of 800 feet, and a total area of 147 acres. Together with Mill Rock, Roosevelt Island constitutes Manhattan's Census Tract 238, which has a land area of 0.279 sq mi, and had a population of 11,661 as of the 2010 United States Census.
Lying below the Queensboro Bridge, the island cannot be accessed directly from the bridge itself. Vehicular traffic uses the Roosevelt Island Bridge to access the island from Astoria, Queens, though the island is not designed for vehicular traffic and has several areas designed as car-free zones. Several public transportation options to reach the island exist. The Roosevelt Island Tramway, the oldest urban commuter tramway in the U.S, connects the island to Manhattan Island's Upper East Side. The Roosevelt Island station carries the F and <f> trains of the New York City Subway.