Railway companies of Illinois

List of railway companies in the American state of Illinois.

Companies based in the United States

 * Amtrak (AMTK), passenger on freight lines
 * Burlington Northern & Gulf Railroad (BNG), freight
 * Chesapeake Southern Railway (CHS), freight
 * Conrail (CR), freight and passenger
 * Kansas City-Santa Fe Railroad (KCSF), freight
 * New York Western Railroad (NYW), freight
 * North Western Pacific Railroad (NWP), freight and passenger
 * Pennsylvania Seaboard Railroad (PS), freight
 * Pere Marquette Railway (PM), freight
 * Union Pacific Railroad (UP), freight

Companies based outside of the United States

 * Canadian National Railway (CN), freight

Regional railways

 * Chicago & Illinois Midland Railway (CIM), freight
 * Metra (METX), passenger on freight lines
 * Wisconsin & Southern Railroad (WSOR), freight

Shortline and terminal railways

 * AG Valley Railroad (AGRR), freight
 * AgRail (AGRL), freight
 * Alton & Southern Railway (ALS), freight
 * A&R Terminal Railroad (ARTR), freight
 * Belt Railway of Chicago (BRC), freight
 * Bloomer Shippers Connecting Railroad (BLOL), freight
 * Burlington Junction Railway (BJRY), freight
 * Chicago-Chemung Railroad (CCUO), freight
 * Chicago & Illinois Midland Railway (CIM), freight
 * Chicago Port Railroad (CPC), freight
 * Chicago Rail Link (CRL), freight
 * Chicago South Shore & South Bend Railroad (CSS), freight and passenger
 * Cicero Central Railroad (CCER), freight
 * Coffeen & Western Railroad (CAEG), freight
 * Crab Orchard & Egyptian Railroad (COER), freight
 * Decatur Central Railroad (DCC), freight
 * Decatur Junction Railway (DT), freight
 * Decatur & Eastern Illinois Railroad (DREI), freight
 * Effingham Railroad (EFRR), freight
 * Evansville Western Railway (EVWR), freight
 * Fisher Farmers Grain & Coal Railroad (FFGC), freight
 * Great Lakes Basin Railroad (GLBT), freight
 * Great Lakes Terminal Railway (GLTR), freight
 * Hussey Terminal Railroad (HTRC), freight
 * Illinois Railway (IR), freight
 * Illinois Western Railroad (ILW), freight
 * Indiana Rail Road (INRD), freight
 * Joppa & Eastern Railroad (JE), freight
 * Kankakee, Beaverville & Southern Railroad (KBSR), freight
 * Keokuk Junction Railway (KJRY), freight
 * KM Railways (KMR), freight
 * Manufacturers' Junction Railway (MJ), freight
 * MetroLink (BSDA), passenger
 * Peoria & Pekin Union Railway (PPU), freight
 * Peru Industrial Railroad (PIRR), freight
 * Pioneer Industrial Railway (PRY), freight
 * Port Harbor Railroad (PHRR), freight
 * Riverport Railroad (RVPR), freight
 * Shawnee Terminal Railway (STR), freight
 * South Chicago & Indiana Harbor Railway (SCIH), freight
 * Terminal Railroad Association of St. Louis (TRRA), freight
 * Vermilion Valley Railroad (VVRR), freight
 * Vandalia Railroad (VRRC), freight

Defunct railways
Years shown here refer to the period in which a given company operated in Illinois; they may have existed elsewhere before or after these years.