The Alton Railroad (reporting mark A) was the final name of a railroad linking Chicago to Alton, Illinois, St. Louis, Missouri, and Kansas City, Missouri. Its predecessor, the Chicago and Alton Railroad (reporting mark C&A), was purchased by the Baltimore and Ohio Railroad in 1931 and was controlled until 1942 when the Alton was released to the courts. On May 31,
Main lines included Chicago to St. Louis and a branch to Kansas City. The former is now part of Union Pacific, with Metra Heritage Corridor commuter rail service north of Joliet (owned by the Canadian National Railway but used by UP). Today, the Kansas City line is part of the Kansas City Southern Railway system.
The earliest ancestor to the Alton Railroad was the Alton and Sangamon Railroad, chartered February 27,
The Joliet and Chicago Railroad was chartered February 15,
In 1925 Chicago & Alton carried 2143 million revenue ton-miles of freight and 202 million revenue passenger-miles on (at year-end) 1056 miles of road and 1863 miles of track. Same numbers for 1944 were 2596, 483, 959 and 1717. By 1950, all of