The St. Louis Car Company was a major United States manufacturer of streetcars and locomotives that existed from 1887–1973, based in St. Louis, Missouri. In the 1940s, St. Louis Car Company was one of the manufacturers of PCC streetcars, a design that was very popular at the time. The firm went on to build some of the vehicles used in the transit systems of New York City and Chicago, as well as the FM OP800 railcars manufactured exclusively for the Southern Railway in 1939. In 1955, SLCC became a division of General Steel Industries and continued business until 1968 and finally ceased operations by 1973.