The history of the Southern Pacific stretches from 1865 to 1998. For the main page, see Southern Pacific Transportation Company; for the former holding company, see Southern Pacific Rail Corporation. The Southern Pacific was represented by three railroads. The original company was called Southern Pacific Railroad, the second was called Southern Pacific Company and the third was called Southern Pacific Transportation Company. The third Southern Pacific railroad, the Southern Pacific Transportation Company, is now operating as the current incarnation of the Union Pacific Railroad.
