The Fulton Street Line, also called the Fulton Street Elevated or Kings County Line, was an elevated rail line mostly in Brooklyn, New York City, United States. It ran above Fulton Street from Fulton Ferry, Brooklyn, in Downtown Brooklyn east to East New York, and then south on Van Sinderen Avenue (southbound) and Snediker Avenue (northbound), east on Pitkin Avenue, north on Euclid Avenue, and east on Liberty Avenue to Ozone Park, Queens.

Fulton Street is a long east–west street in northern Brooklyn, New York City. This street begins at the intersection of Adams Street and Joralemon Street in Brooklyn Heights, and runs eastward to East New York and Cypress Hills. At the border with Queens, Fulton Street becomes 91st Avenue, which ends at 84th Street in Woodhaven.