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. The portion in Brooklyn has been torn down, but most of the line in Queens has been connected to the New York City Subway and is now part of the IND Fulton Street Line (a portion of the A and C), an underground line that replaced the elevated line in Brooklyn. The structure was the main line of the Kings County Elevated Railway, first opened in 1888.
The Kings County Elevated Railway opened the line, from dual western terminals at Fulton Ferry and Brooklyn Bridge (Sands Street) east to Nostrand Avenue, on April 24, 1888. Construction on this line started in the fall of 1885, when ground was broken at the corner of Fulton Street and Red Hook Lane. It was extended east to Albany Avenue on May 30, 1888; Albany Avenue was an eastbound-only station, and the westbound station just beyond at Sumner Avenue had yet to be completed, so it temporarily served both directions. The line was further extended to Ralph Avenue on September 20, 1888 and completed to BMT Fulton Street Line at the west end of East New York in early November.