The IllinoisCentral Railroad was chartered in 1851 to build a railroad from Cairo, Illinois, at the joining of the Ohio and Mississippi rivers, to Galena, in the extreme northwestern corner of the state (the "Old Main"), with a branch from Centralia (named for the railroad) to Chicago (the "Chicago Branch").
The NOJandGN and Mississippi Central were then reorganized in 1877 as the New Orleans, Jackson and Northern and the Central Mississippi, respectively, and then consolidated as the Chicago, St. Louis and New Orleans Railroad, a subsidiary of the IC.
In 1972 the IllinoisCentral merged with the parallel Gulf Mobile and Ohio to form IllinoisCentral Gulf.
The IllinoisCentral (AAR reporting mark IC), sometimes called the Main Line of Mid-America, was a railroad carrier in the central United States, with its primary routes from Chicago to New Orleans and Sioux Falls.
The IllinoisCentral was officially chartered by the General Assembly in 1851.
On August 10, 1972 the IllinoisCentral Railroad merged with the Gulf, Mobile and Ohio Railroad to form the IllinoisCentral Gulf Railroad.