Bethlehem Staten Island also called Bethlehem Mariners Harbor was a large shipyard in Mariners Harbor, Staten Island, New York. The shipyard started building ships for World War II in January 1941 under the Emergency Shipbuilding Program and as the result of the Two-Ocean Navy Act of July 1940. The shipyard was part of the Bethlehem Shipbuilding Corporation which built ships for the United States Navy, and the United States Maritime Commission. Bethlehem Steel purchased the shipyard in June 1938 from United Shipyards. Bethlehem Shipbuilding Corporation closed the shipyard in 1959. The propeller factory and foundry continued operation for 10 more years at the site. Since 1980 the site is the May Ship Repair Contracting Corporation next to Shooters Island at the southern end of Newark Bay, off the North Shore.

Mariners Harbor is a neighborhood located in the northwestern part of New York City's borough of Staten Island. It is bordered by Lake Avenue to the east, Forest Avenue to the south, Richmond Terrace to the north, and Holland Avenue to the west. The northwestern section of Mariners Harbor is often known as Arlington.