The following railroads are operating in the U.S. state of Illinois.
| Name | Mark | System[nb 1] | From | To | Successor | Notes |
|---|---|---|---|---|---|---|
| Addison Railroad | IC | 1890 | 1892 | Chicago, Madison and Northern Railroad | ||
| Albany Railroad Bridge Company | CNW | 1857 | 1909 | Chicago and North Western Railway | ||
| Alton Railroad | A | GM&O | 1931 | 1947 | Gulf, Mobile and Ohio Railroad | |
| Alton and Eastern Railroad | ITC | 1925 | 1937 | Illinois Terminal Railroad | ||
| Alton and St. Louis Railroad | GM&O | 1859 | 1899 | Chicago and Alton Railroad | ||
| Alton and Sangamon Railroad | GM&O | 1847 | 1852 | Chicago and Mississippi Railroad | ||
| Alton and Southern Railroad | MP/ SSW | 1910 | 1968 | Alton and Southern Railway | ||
| Alton and Southern Railway | MP/ SSW | 1911 | 1913 | Alton and Southern Railroad | ||
| Alton Terminal Railway | ITC | 1889 | 1937 | Illinois Terminal Railroad | ||
| American Bottom Lime, Marble and Coal Company | 1857 | 1873 | East St. Louis and Carondelet Railway | |||
| American Central Railway | CB&Q | 1859 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Ashdale and Thomson Railway | MILW | 1902 | 1903 | Chicago, Milwaukee and St. Paul Railway | ||
| Atchison, Topeka and Santa Fe Railroad | ATSF | 1889 | 1895 | Atchison, Topeka and Santa Fe Railway | ||
| Atchison, Topeka and Santa Fe Railroad in Chicago | ATSF | 1887 | 1902 | Atchison, Topeka and Santa Fe Railway | ||
| Atchison, Topeka and Santa Fe Railway | ATSF | ATSF | 1895 | 1996 | BNSF Railway | |
| Atlanta and Lawndale Railroad | GM&O | 1905 | 1915 | Chicago and Alton Railroad | ||
| Atlantic and Pacific Railroad | MILW | 1865 | 1872 | Chicago and Pacific Railroad | ||
| Aurora Branch Railroad | CB&Q | 1849 | 1852 | Chicago and Aurora Railroad | ||
| Baltimore and Ohio Railroad | B&O, BO | B&O | 1874 | 1987 | Chesapeake and Ohio Railway | |
| Baltimore and Ohio and Chicago Railroad | B&O | 1876 | 1949 | Baltimore and Ohio Railroad | ||
| Baltimore and Ohio Connecting Railroad | B&O | 1892 | 1990 | CSX Transportation | ||
| Baltimore and Ohio Southwestern Railroad | B&O | 1899 | 1949 | Baltimore and Ohio Railroad | ||
| Baltimore and Ohio Southwestern Railway | B&O | 1893 | 1899 | St. Louis, Springfield and Vincennes Railway | ||
| Baltimore, Pittsburgh and Chicago Railway | B&O | 1873 | 1876 | Baltimore and Ohio and Chicago Railroad | ||
| Belleville and Carondelet Railroad | IC | 1881 | 1897 | St. Louis, Alton and Terre Haute Railroad | ||
| Belleville, Centralia and Eastern Railroad | SOU | 1889 | 1889 | Louisville, Evansville and St. Louis Consolidated Railroad | ||
| Belleville City Railway | IC | 1867 | 1895 | St. Louis, Belleville and Southern Railway | ||
| Belleville and Eldorado Railroad | IC | 1861 | 1897 | St. Louis, Alton and Terre Haute Railroad | ||
| Belleville and Illinoistown Railroad | NYC | 1849 | 1856 | Terre Haute, Alton and St. Louis Railroad | ||
| Belleville and O'Fallon Railroad | L&N | 1869 | 1871 | St. Louis and Southeastern Railway | ||
| Belleville and Southern Illinois Railroad | IC | 1857 | 1897 | St. Louis, Alton and Terre Haute Railroad | ||
| Benton Southern Railroad | IC | 1915 | 1946 | Illinois Central Railroad | ||
| Bloomington and Ohio River Railroad | WAB | 1869 | 1872 | Chicago and Paducah Railroad | ||
| Bloomington and Pekin Railroad | NYC | 1853 | 1867 | Danville, Urbana, Bloomington and Pekin Railroad | ||
| Blue Island Railroad | IC | 1891 | 1987 | Northeast Illinois Regional Commuter Railroad Corporation | ||
| Bridgeport and South Chicago Railroad | B&O | 1887 | 1890 | Chicago and Northern Pacific Railroad | ||
| Bureau County Mineral Railway | MILW | 1904 | 1909 | Rochelle and Southern Railway | ||
| Burlington, Monmouth and Illinois River Railway | MSTL | 1875 | 1881 | Peoria and Farmington Railway | ||
| Burlington Northern Inc. | BN | 1970 | 1981 | Burlington Northern Railroad | ||
| Burlington Northern Railroad | BN | 1981 | 1996 | BNSF Railway | ||
| Cairo and St. Louis Railroad | GM&O | 1865 | 1881 | St. Louis and Cairo Railroad | ||
| Cairo Terminal Railroad | CTML | 1982 | 1996 | Shawnee Terminal Railway | ||
| Cairo and Thebes Railroad | MP | 1905 | 1956 | Missouri Pacific Railroad | ||
| Cairo and Vincennes Railroad | NYC | 1867 | 1880 | Cairo and Vincennes Railway | ||
| Cairo and Vincennes Railway | NYC | 1880 | 1881 | Wabash, St. Louis and Pacific Railway | ||
| Cairo, Vincennes and Chicago Railway | NYC | 1889 | 1913 | Cleveland, Cincinnati, Chicago and St. Louis Railway | ||
| Calumet and Blue Island Railway | EJ&E | 1889 | 1897 | Chicago, Lake Shore and Eastern Railway | ||
| Calumet, Hammond and Southeastern Railroad | 1906 | 1919 | Chicago Short Line Railway | |||
| Calumet River Railway | PRR | 1883 | 1901 | South Chicago and Southern Railroad | ||
| Calumet and Southeastern Railroad | 1902 | 1909 | Chicago, West Pullman and Southern Railroad | |||
| Calumet Western Railway | NYC/ PRR/ RI | 1897 | Still exists as a nonoperating subsidiary of Chicago Rail Link | |||
| Camanche, Albany and Mendota Railroad | CB&Q | 1856 | 1859 | Illinois Grand Trunk Railway | ||
| Carbondale and Shawneetown Railroad | IC | 1869 | 1897 | St. Louis, Alton and Terre Haute Railroad | ||
| Carthage and Burlington Railroad | CB&Q | 1867 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Casey and Kansas Railroad | 1926 | 1937 | N/A | |||
| Central Illinois Railway | 1905 | 1906 | Chicago and Illinois Midland Railway | |||
| Central Illinois and Wisconsin Railway | MILW | 1880 | 1900 | Chicago, Milwaukee and St. Paul Railway | ||
| Central Iowa Railway | MSTL | 1882 | 1886 | Iowa Central Railway | ||
| Central Military Tract Railroad | CB&Q | 1851 | 1856 | Chicago, Burlington and Quincy Railroad | ||
| Central Terminal Railway | CP | 1911 | 1987 | Soo Line Railroad | ||
| Central Wisconsin Railroad | CWRC | 1982 | 1985 | Wisconsin and Calumet Railroad | ||
| Centralia and Altamont Railroad | MP | 1889 | 1894 | Centralia and Chester Railroad | ||
| Centralia and Chester Railroad | MP | 1883 | 1900 | Illinois Southern Railway | ||
| Centralia and Sandoval Railroad | CB&Q | 1909 | 1917 | Chicago, Burlington and Quincy Railroad | ||
| Champaign, Havana and Western Railway | IC | 1879 | 1880 | Wabash, St. Louis and Pacific Railway | ||
| Champaign and Southeastern Railway | WAB | 1880 | 1903 | Wabash Railroad | ||
| Charleston, Neoga and St. Louis Railroad | NKP | 1880 | 1881 | Toledo, Cincinnati and St. Louis Railroad | ||
| Chesapeake and Ohio Railway | C&O, CO | C&O | 1921 | 1987 | CSX Transportation | |
| Chesapeake and Ohio Railway of Indiana | C&O | 1910 | 1934 | Chesapeake and Ohio Railway | ||
| Chester and Iron Mountain Railroad | MP | 1873 | Iron Mountain, Chester and Eastern Railroad | |||
| Chester and Kaskaskia Railroad | MP | 1877 | 1878 | Wabash, Chester and Western Railroad | ||
| Chester and Mount Vernon Railroad | MP | 1927 | 1956 | Missouri Pacific Railroad | ||
| Chester and Tamaroa Coal and Railroad Company | MP | 1869 | 1873 | Iron Mountain, Chester and Eastern Railroad | ||
| Chicago and Alton Railroad | C&A | GM&O | 1861 | 1931 | Alton Railroad | |
| Chicago and Alton Railway | GM&O | 1900 | 1906 | Chicago and Alton Railroad | ||
| Chicago, Alton and St. Louis Railroad | GM&O | 1855 | 1856 | St. Louis, Alton and Chicago Railroad | ||
| Chicago and Atlantic Railway | ERIE | 1873 | 1890 | Chicago and Erie Railroad | ||
| Chicago and Atlantic Extension Railway | ERIE | 1873 | 1873 | Chicago and Atlantic Railway | ||
| Chicago and Aurora Railroad | CB&Q | 1852 | 1855 | Chicago, Burlington and Quincy Railroad | ||
| Chicago, Burlington and Northern Railroad | CB&Q | 1885 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Chicago, Burlington and Quincy Railroad | CB&Q, CBQ | CB&Q | 1855 | 1970 | Burlington Northern Inc. | |
| Chicago, Burlington and Quincy Railway | CB&Q | 1901 | 1907 | N/A | Operated the Chicago, Burlington and Quincy Railroad under lease, but did not own any railroad | |
| Chicago and Calumet River Railroad | 1901 | 1956 | N/A | |||
| Chicago and Calumet Terminal Railway | B&O | 1886 | 1898 | Chicago Terminal Transfer Railroad | ||
| Chicago and Canada Southern Railway | 1871 | 1888 | N/A | Sold at foreclosure; no property in Illinois | ||
| Chicago and Carbondale Railroad | IC | 1895 | 1895 | Chicago and Texas Railroad | ||
| Chicago Central Railway | B&O | 1889 | 1891 | Chicago and Northern Pacific Railroad | ||
| Chicago, Cincinnati and Louisville Railroad | C&O | 1907 | 1910 | Chesapeake and Ohio Railway of Indiana | ||
| Chicago, Danville and St. Louis Railroad | C&EI | 1887 | 1887 | Chicago and Eastern Illinois Railroad | ||
| Chicago, Danville and Vincennes Railroad | C&EI | 1865 | 1877 | Chicago and Nashville Railroad | ||
| Chicago and Eastern Illinois Railroad | C&EI, CEI | C&EI | 1940 | 1976 | Missouri Pacific Railroad | |
| Chicago and Eastern Illinois Railroad | C&EI | 1877 | 1922 | Chicago and Eastern Illinois Railway | ||
| Chicago and Eastern Illinois Railway | C&EI | C&EI | 1922 | 1940 | Chicago and Eastern Illinois Railroad | |
| Chicago and Erie Railroad | ERIE | 1890 | 1941 | Erie Railroad | ||
| Chicago and Evanston Railroad | MILW | 1861 | 1885 | Chicago, Evanston and Lake Superior Railway | ||
| Chicago, Evanston and Lake Superior Railway | MILW | 1885 | 1900 | Chicago, Milwaukee and St. Paul Railway | ||
| Chicago and Grand Trunk Railway | CN | 1880 | 1900 | Chicago Lake County Railway | ||
| Chicago and Great Eastern Railway | PRR | 1863 | 1868 | Columbus, Chicago and Indiana Central Railway | ||
| Chicago Great Western Railroad | CGW | CGW | 1909 | 1941 | Chicago Great Western Railway | |
| Chicago and Great Western Railroad | B&O | 1873 | 1890 | Chicago and Northern Pacific Railroad | ||
| Chicago Great Western Railway | CGW | CGW | 1941 | 1968 | Chicago and North Western Railway | |
| Chicago Great Western Railway | CGW | 1892 | 1909 | Chicago Great Western Railroad | ||
| Chicago, Hammond and Western Railroad | NYC | 1896 | 1898 | Chicago Junction Railway | ||
| Chicago, Harlem and Batavia Railway | B&O | 1885 | 1890 | Chicago and Northern Pacific Railroad | ||
| Chicago, Havana and Western Railroad | IC | 1886 | 1902 | Illinois Central Railroad | ||
| Chicago Heights and Northern Railway | EJ&E | 1897 | Elgin, Joliet and Eastern Railway | |||
| Chicago Heights Terminal Transfer Railroad | CHTT | C&EI | 1898 | Still exists as a subsidiary of the Union Pacific Railroad | ||
| Chicago and Illinois Midland Railway | C&IM, CIM | 1906 | 1996 | Illinois and Midland Railroad | ||
| Chicago and Illinois River Railroad | GM&O | 1867 | 1879 | Chicago and Alton Railroad | ||
| Chicago and Illinois Southern Railroad | IC | 1877 | ||||
| Chicago and Illinois Southern Railroad | IC | 1871 | 1872 | Chicago and Illinois Southern Railway | ||
| Chicago and Illinois Southern Railway | IC | 1872 | 1876 | Decatur, Sullivan and Mattoon Railroad, Grayville and Mattoon Railroad | ||
| Chicago and Illinois Western Railroad | C&IW, CIW | IC | 1903 | Illinois Central Railroad | ||
| Chicago and Indiana Railroad | CINR | 1979 | 1979 | N/A | ||
| Chicago, Indiana and Southern Railroad | NYC | 1906 | 1914 | New York Central Railroad | ||
| Chicago and Indiana State Line Railway | NYC | 1880 | 1898 | Chicago Junction Railway | ||
| Chicago, Indianapolis and Louisville Railway | CI&L, CIL | MON | 1897 | 1956 | Monon Railroad | |
| Chicago, Indianapolis and St. Louis Short Line Railway | NYC | 1903 | 1913 | Cleveland, Cincinnati, Chicago and St. Louis Railway | ||
| Chicago and Iowa Railroad | CB&Q | 1869 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Chicago Junction Railway | NYC | 1898 | 1958 | Chicago River and Indiana Railroad | ||
| Chicago and Kenosha Railway | EJ&E | 1889 | 1913 | Illinois Steel Company | ||
| Chicago Lake County Railway | CN | 1900 | 1900 | Grand Trunk Western Railway | ||
| Chicago and Lake Huron Railroad | CN | 1873 | 1879 | North Western Grand Trunk Railway | ||
| Chicago, Lake Shore and Eastern Railway | EJ&E | 1897 | 1938 | Elgin, Joliet and Eastern Railway | ||
| Chicago and Lake Superior Railroad | MILW | 1883 | 1885 | Chicago, Evanston and Lake Superior Railway | ||
| Chicago, Madison and Northern Railroad | 1980 | 1982 | Central Wisconsin Railroad | |||
| Chicago, Madison and Northern Railroad | IC | 1886 | 1903 | Illinois Central Railroad | ||
| Chicago, Millington and Western Railway | 1872 | N/A | ||||
| Chicago and Milwaukee Railroad | CNW | 1853 | 1863 | Chicago and Milwaukee Railway | ||
| Chicago and Milwaukee Railway | CNW | 1863 | 1881 | Chicago, Milwaukee and North Western Railway | ||
| Chicago, Milwaukee and Gary Railway | CM&G | MILW | 1908 | 1930 | Chicago, Milwaukee, St. Paul and Pacific Railroad | |
| Chicago, Milwaukee and North Western Railway | CNW | 1881 | 1883 | Chicago and North Western Railway | ||
| Chicago, Milwaukee and St. Paul Railway | MILW | 1872 | 1928 | Chicago, Milwaukee, St. Paul and Pacific Railroad | ||
| Chicago, Milwaukee, St. Paul and Pacific Railroad | MILW | MILW | 1928 | 1985 | The Milwaukee Road, Inc. | |
| Chicago and Mississippi Railroad | GM&O | 1852 | 1855 | Chicago, Alton and St. Louis Railroad | ||
| Chicago, Missouri and Western Railway | CMNW | 1987 | 1990 | Gateway Western Railway, SPCSL Corporation | ||
| Chicago and Nashville Railroad | C&EI | 1877 | 1877 | Chicago and Eastern Illinois Railroad | ||
| Chicago and North Western Railway | CNW | CNW | 1859 | 1972 | Chicago and North Western Transportation Company | |
| Chicago and North Western Transportation Company | CNW | CNW | 1972 | 1995 | Union Pacific Railroad | |
| Chicago and North Wisconsin Railway | CB&Q | 1883 | 1887 | Chicago, Burlington and Northern Railroad | ||
| Chicago Northern Railway | CNW | 1902 | 1903 | Chicago and North Western Railway | ||
| Chicago and Northern Pacific Railroad | B&O | 1889 | 1896 | Chicago Terminal Transfer Railroad | ||
| Chicago and Ohio River Railroad | B&O | 1873 | 1893 | Peoria, Decatur and Evansville Railway | ||
| Chicago and Pacific Railroad | MILW | 1872 | 1900 | Chicago, Milwaukee and St. Paul Railway | ||
| Chicago and Paducah Railroad | WAB | 1872 | 1880 | Wabash, St. Louis and Pacific Railway | ||
| Chicago, Paducah and Memphis Railroad | C&EI | 1893 | 1897 | Chicago and Eastern Illinois Railroad | ||
| Chicago, Palatine and Wauconda Railroad | 1921 | 1924 | N/A | |||
| Chicago, Pekin and Southwestern Railroad | ATSF | 1869 | 1881 | Chicago, St. Louis and Western Railroad | ||
| Chicago, Peoria and St. Louis Railroad | 1909 | 1924 | Alton and Eastern Railroad, Chicago, Springfield and St. Louis Railway, Jacksonville and Havana Railroad, Springfield, Havana and Peoria Railroad | |||
| Chicago, Peoria and St. Louis Railway | 1888 | 1896 | Chicago, Peoria and St. Louis Railroad of Illinois | |||
| Chicago, Peoria and St. Louis Railroad of Illinois | 1896 | 1900 | Chicago, Peoria and St. Louis Railway of Illinois | |||
| Chicago, Peoria and St. Louis Railway of Illinois | 1900 | 1912 | Chicago, Peoria and St. Louis Railroad | |||
| Chicago, Peoria and Western Railway | 1898 | Still exists as a lessor of the Belt Railway of Chicago | ||||
| Chicago and Plainfield Railroad | ATSF | 1859 | 1869 | Chicago, Plainfield and Pekin Railroad | ||
| Chicago, Plainfield and Pekin Railroad | ATSF | 1869 | 1869 | Chicago, Pekin and Southwestern Railroad | ||
| Chicago Produce Terminal Company | CPTC | 1929 | 1977 | N/A | ||
| Chicago River and Indiana Railroad | CRI | NYC | 1904 | 1976 | Consolidated Rail Corporation | |
| Chicago and Rock Island Railroad | RI | 1851 | 1866 | Chicago, Rock Island and Pacific Railroad | ||
| Chicago, Rock Island and Pacific Railroad | RI, ROCK | RI | 1948 | 1980 | Baltimore and Ohio Railroad, Iowa Railroad, La Salle and Bureau County Railroad, Norfolk and Western Railway, Peoria and Pekin Union Railway | |
| Chicago, Rock Island and Pacific Railroad | RI | 1866 | 1880 | Chicago, Rock Island and Pacific Railway | ||
| Chicago, Rock Island and Pacific Railway | RI | RI | 1880 | 1948 | Chicago, Rock Island and Pacific Railroad | |
| Chicago and Rock River Railroad | CB&Q | 1869 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Chicago, Rockford and Northern Railroad | CB&Q | 1874 | 1892 | Chicago and Iowa Railroad | ||
| Chicago and St. Louis Railway | ATSF | 1885 | 1886 | Chicago, Santa Fe and California Railway | ||
| Chicago, St. Charles and Mississippi Air Line Railroad | CNW | 1853 | 1855 | Galena and Chicago Union Railroad | ||
| Chicago, St. Louis and Ohio River Railroad | IC | 1900 | 1901 | St. Louis and Ohio River Railroad | ||
| Chicago, St. Louis and Paducah Railway | IC | 1887 | 1897 | St. Louis, Alton and Terre Haute Railroad | ||
| Chicago, St. Louis and Pittsburgh Railroad | PRR | 1883 | 1890 | Pittsburgh, Cincinnati, Chicago and St. Louis Railway | ||
| Chicago, St. Louis and Western Railroad | ATSF | 1882 | 1885 | Chicago and St. Louis Railway | ||
| Chicago, St. Paul and Fond du Lac Railroad | CNW | 1855 | 1859 | Chicago and North Western Railway | ||
| Chicago and Santa Fe Railroad | 1889 | |||||
| Chicago, Santa Fe and California Railway | ATSF | 1886 | 1900 | Atchison, Topeka and Santa Fe Railway | ||
| Chicago Short Line Railway | CSL | 1900 | 2002 | South Chicago and Indiana Harbor Railway | ||
| Chicago South Branch Dock Company | B&O | 1859 | 1888 | Bridgeport and South Chicago Railroad | ||
| Chicago South Shore and South Bend Railroad | CSS | 1925 | ||||
| Chicago and Southern Railroad | CN | 1874 | 1878 | Chicago and State Line Railway | ||
| Chicago and Southeastern Railway | EJ&E | 1889 | 1913 | Illinois Steel Company | ||
| Chicago Southern Railway | MILW | 1904 | 1910 | Chicago, Terre Haute and Southeastern Railway of Illinois | ||
| Chicago and Southwestern Railroad | B&O | 1890 | 1891 | Chicago and Northern Pacific Railroad | ||
| Chicago and Springfield Railroad | IC | 1877 | 1902 | Illinois Central Railroad | ||
| Chicago, Springfield and St. Louis Railroad | IC | 1883 | 1886 | Litchfield and St. Louis Railway | ||
| Chicago, Springfield and St. Louis Railway | 1925 | 1942 | Springfield and Southwestern Railroad | |||
| Chicago and State Line Railroad | NKP | 1887 | 1923 | New York, Chicago and St. Louis Railroad | ||
| Chicago and State Line Railway | CNW | 1905 | 1905 | Milwaukee and State Line Railway | ||
| Chicago and State Line Railway | CN | 1878 | 1879 | North Western Grand Trunk Railway | ||
| Chicago and Strawn Railway | WAB | 1879 | 1880 | Wabash, St. Louis and Pacific Railway | ||
| Chicago Suburban Railway | MILW | 1882 | 1898 | Chicago, Evanston and Lake Superior Railway | ||
| Chicago and Superior Railroad | MILW | 1873 | 1880 | Chicago, Milwaukee and St. Paul Railway | ||
| Chicago Terminal Railroad | CTM | 2007 | 2019 | City of Chicago | ||
| Chicago Terminal Transfer Railroad | B&O | 1897 | 1910 | Baltimore and Ohio Chicago Terminal Railroad | ||
| Chicago, Terre Haute and Southeastern Railway | CTSE | MILW | 1910 | 1921 | Chicago, Milwaukee, St. Paul and Pacific Railroad | |
| Chicago, Terre Haute and Southeastern Railway of Illinois | MILW | 1910 | 1910 | Chicago, Terre Haute and Southeastern Railway | ||
| Chicago and Texas Railroad | IC | 1893 | 1902 | Illinois Central Railroad | ||
| Chicago and Tomah Railroad | CNW | 1880 | 1880 | Milwaukee and Madison Railway | ||
| Chicago Union Station Company | CUST | CB&Q/ MILW/ PRR | 1915 | Still exists as a subsidiary of the National Railroad Passenger Corporation (Amtrak) | ||
| Chicago Union Transfer Railway | C&EI/ CN/ ERIE/ MON/ WAB | 1888 | 1912 | Chicago and Western Indiana Railroad | ||
| Chicago, West Pullman and Southern Railroad | CWP | 1909 | 1996 | Chicago Rail Link | ||
| Chicago, West Pullman and Southern Railway | 1900 | 1909 | Chicago, West Pullman and Southern Railroad | |||
| Chicago and West Ridge Railroad | 1893 | |||||
| Chicago and Western Dummy Railway | B&O | 1879 | 1885 | Chicago, Harlem and Batavia Railway | ||
| Chicago and Western Indiana Railroad | C&WI, CWI | C&EI/ CN/ ERIE/ MON/ WAB | 1879 | Still exists as a nonoperating subsidiary of the Union Pacific Railroad | ||
| Chicago and Western Indiana Belt Railway | C&EI/ CN/ ERIE/ MON/ WAB | 1881 | 1882 | Chicago and Western Indiana Railroad | ||
| Chicago and Wisconsin Railroad | CP | 1884 | 1899 | Wisconsin Central Railway | ||
| Chicago, Zeigler and Gulf Railway | 1902 | |||||
| Christopher and Herrin Railroad | IC | 1903 | 1903 | Illinois Central Railroad | ||
| Cincinnati, Hamilton and Dayton Railway | B&O | 1905 | 1915 | N/A | Leased the Cincinnati, Indianapolis and Western Railway | |
| Cincinnati, Indianapolis, St. Louis and Chicago Railway | NYC | 1880 | 1889 | Cleveland, Cincinnati, Chicago and St. Louis Railway | ||
| Cincinnati, Indianapolis and Western Railroad | CIWN | B&O | 1915 | 1990 | CSX Transportation | |
| Cincinnati, Indianapolis and Western Railway | B&O | 1902 | 1915 | Cincinnati, Indianapolis and Western Railroad, Sidell and Olney Railroad | ||
| Cincinnati, Lafayette and Chicago Railroad | NYC | 1871 | 1938 | Cleveland, Cincinnati, Chicago and St. Louis Railway | ||
| Cincinnati, Louisville and Vincennes Railway | B&O | 1899 | 1899 | Baltimore and Ohio Southwestern Railroad | ||
| Cleveland, Cincinnati, Chicago and St. Louis Railway | NYC | 1889 | 1976 | Consolidated Rail Corporation | ||
| Clinton, Bloomington and North Eastern Railway | IC | 1878 | 1880 | Kankakee and South Western Railroad | ||
| Coal Belt Railway | MP | 1903 | 1909 | St. Louis, Iron Mountain and Southern Railway | ||
| Collinsville and Troy Railroad | ITC | 1899 | 1902 | St. Louis, Troy and Eastern Railroad | ||
| Columbus, Chicago and Indiana Central Railway | PRR | 1868 | 1883 | Chicago, St. Louis and Pittsburgh Railroad | ||
| Consolidated Rail Corporation | CR | 1976 | 1999 | CSX Transportation, Norfolk Southern Railway | ||
| Cook, Lake and McHenry Counties Railway | MILW | 1899 | 1901 | Chicago, Milwaukee and St. Paul Railway | ||
| Danville and Grape Creek Railroad | C&EI | 1880 | 1881 | Chicago and Eastern Illinois Railroad | ||
| Danville and Indiana Harbor Railroad | NYC | 1905 | 1906 | Chicago, Indiana and Southern Railroad | ||
| Danville, Olney and Ohio River Railroad | B&O, IC | 1869 | 1886 | Chicago and Ohio River Railroad | ||
| Danville and Pekin Railway | NYC | 1878 | 1879 | Indiana, Bloomington and Western Railway | ||
| Danville and Rosedale Railway | C&EI | 1870 | 1872 | Evansville, Terre Haute and Chicago Railway | ||
| Danville and Southwestern Railroad | NYC | 1879 | 1881 | Wabash, St. Louis and Pacific Railway | ||
| Danville, Tuscola and Western Railroad | C&EI | 1887 | 1887 | Chicago, Danville and St. Louis Railroad | ||
| Danville, Urbana, Bloomington and Pekin Railroad | NYC | 1867 | 1869 | Indianapolis, Bloomington and Western Railway | ||
| Davenport and Rock Island Railway Bridge Company | CB&Q/ MILW | 1884 | 1895 | Davenport and Rock Island Bridge, Railway and Terminal Company | ||
| Davenport and Rock Island Bridge, Railway and Terminal Company | CB&Q/ MILW | 1895 | 1898 | Davenport, Rock Island and North Western Railway | ||
| Davenport, Rock Island and North Western Railway | DRI | CB&Q/ MILW | 1898 | 1995 | Burlington Northern Railroad, Soo Line Railroad | |
| Davenport, Rock Island and Northwestern Railway | CB&Q/ MILW | 1900 | 1901 | Davenport, Rock Island and North Western Railway | ||
| Decatur and East St. Louis Railroad | WAB | 1867 | 1870 | Toledo, Wabash and Western Railway | ||
| Decatur and Eastern Railway | B&O | 1894 | 1895 | Indiana, Decatur and Western Railway | ||
| Decatur and Indianapolis Railroad | B&O | 1853 | 1855 | Indiana and Illinois Central Railway | ||
| Decatur, Mattoon and Southern Railroad | IC | 1878 | 1879 | Peoria, Decatur and Evansville Railway | ||
| Decatur, Sullivan and Mattoon Railroad | IC | 1876 | 1877 | Decatur, Mattoon and Southern Railroad | ||
| Decatur, Sullivan and Mattoon Railroad | IC | 1869 | 1872 | Chicago and Illinois Southern Railway | ||
| De Kalb and Great Western Railway | CGW | 1895 | 1911 | Chicago Great Western Railroad | ||
| Denverside Connecting Railway | MP/ SSW | 1910 | 1913 | Alton and Southern Railroad | ||
| De Pue, Ladd and Eastern Railroad | CNW | 1888 | 1920 | Chicago and North Western Railway | ||
| Depue and Northern Railroad | 1904 | |||||
| Des Plaines Valley Railway | CNW | 1909 | 1913 | Chicago and North Western Railway | ||
| Dixon, Peoria and Hannibal Railroad | CB&Q | 1867 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Dixon and Quincy Railroad | CB&Q | 1869 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Dixon, Rock Falls and Southwestern Electric Railway | 1903 | 1913 | Hooppole, Yorktown and Tampico Railroad | Operated by steam | ||
| Dixon, Rockford and Kenosha Railway | CNW | 1864 | 1864 | Chicago and North Western Railway | ||
| Dixon, Rockford and State Line Railroad | CNW | 1864 | 1864 | Dixon, Rockford and Kenosha Railway | ||
| Dunleith and Dubuque Bridge Company | IC | 1857 | 1946 | Illinois Central Railroad | ||
| East St. Louis Belt Railroad | 1898 | Terminal Railroad Association of St. Louis | ||||
| East St. Louis and Carondelet Railway | 1873 | Terminal Railroad Association of St. Louis | ||||
| East St. Louis Connecting Railway | 1878 | Terminal Railroad Association of St. Louis | ||||
| East St. Louis Junction Railroad | ESLJ | CNW | 1918 | Still exists as a lessor of the Union Pacific Railroad | ||
| East St. Louis, Madison and Granite City Railroad | SOU | 1900 | 1904 | Southern Railway | ||
| East and West Illinois Railway | MP | 1902 | 1902 | St. Louis Valley Railway | ||
| Eastern Illinois and Missouri Railroad | C&EI | 1899 | 1899 | Chicago and Eastern Illinois Railroad | ||
| Eastern Illinois and St. Louis Railroad | C&EI | 1903 | 1905 | Chicago and Eastern Illinois Railroad | ||
| Eldorado, Marion and Southwestern Railroad | MP | 1906 | 1913 | Marion and Eastern Railroad | ||
| Electric City and Illinois Railway | 1889 | 1891 | Madison, Illinois and St. Louis Railway | |||
| Elgin and State Line Railroad | CNW | 1859 | 1883 | Chicago and North Western Railway | ||
| Englewood Connecting Railway | PRR | 1885 | 1954 | Penndel Company | ||
| Erie Railroad | ERIE | ERIE | 1941 | 1960 | Erie–Lackawanna Railroad | |
| Erie–Lackawanna Railroad | EL | 1960 | 1968 | Erie Lackawanna Railway | ||
| Erie Lackawanna Railway | EL | 1968 | 1976 | Consolidated Rail Corporation | ||
| Erie Western Railway | ERES | 1977 | 1979 | Chicago and Indiana Railroad | ||
| Evansville, Mount Carmel and Northern Railway | NYC | 1906 | 1938 | Cleveland, Cincinnati, Chicago and St. Louis Railway | ||
| Evansville and Southern Illinois Railway | L&N | 1869 | 1871 | St. Louis and Southeastern Railroad | ||
| Evansville, Terre Haute and Chicago Railway | C&EI | 1872 | 1899 | Chicago and Eastern Illinois Railroad | ||
| Fairbury, Pontiac and Northwestern Railway | WAB | 1867 | 1872 | Chicago and Paducah Railroad | ||
| Fenton and Thomson Railroad | CB&Q | 1903 | 1906 | Chicago, Burlington and Quincy Railroad | ||
| Fond du Lac, Amboy and Peoria Railway | MILW | 1874 | 1883 | Chicago, Milwaukee and St. Paul Railway | ||
| Fort Wayne and Chicago Railroad | PRR | 1853 | 1856 | Pittsburgh, Fort Wayne and Chicago Railroad | ||
| Fox River Valley Railroad | CNW | 1852 | 1858 | Elgin and State Line Railroad | ||
| Franklin and Waverly Railway | CB&Q | 1908 | 1917 | Chicago, Burlington and Quincy Railroad | ||
| Fredonia and Reeds Railroad | IC | 1914 | 1946 | Illinois Central Railroad | ||
| Freeport, Dodgeville and Northern Railroad | IC | 1887 | 1888 | Chicago, Madison and Northern Railroad | ||
| Fulton County Extension Railway | CB&Q | 1881 | 1908 | Fulton County Narrow Gauge Railway | ||
| Fulton County Narrow Gauge Railway | CB&Q | 1878 | 1908 | Chicago, Burlington and Quincy Railroad | ||
| Galena and Chicago Union Railroad | CNW | 1836 | 1864 | Chicago and North Western Railway | ||
| Galena and Illinois River Railroad | PRR | 1857 | 1863 | Chicago and Great Eastern Railway | ||
| Galena and Southern Wisconsin Railroad | CNW | 1853 | 1879 | Galena and Wisconsin Railroad | ||
| Galena and Wisconsin Railroad | CNW | 1879 | 1880 | Chicago and Tomah Railroad | ||
| Galesburg, Etherly and Eastern Railroad | 1894 | 1898 | Galesburg and Great Eastern Railroad | |||
| Galesburg and Great Eastern Railroad | 1898 | 1960 | N/A | |||
| Galesburg and Rio Railroad | CB&Q | 1886 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Galesburg, Rockford and Northern Railroad | 1917 | 1922 | Hooppole, Yorktown and Tampico Railroad | |||
| Gardner, Coal City and Northern Railway | EJ&E | 1891 | Elgin, Joliet and Eastern Railway | |||
| Gateway Western Railway | GWWR | 1990 | 2001 | Kansas City Southern Railway | ||
| Gilman, Clinton and Springfield Railroad | IC | 1867 | 1877 | Chicago and Springfield Railroad | ||
| Grand Tower and Cape Girardeau Railroad | IC | 1889 | 1893 | Chicago and Texas Railroad | ||
| Grand Tower and Carbondale Railroad | IC | 1882 | 1893 | Chicago and Texas Railroad | ||
| Grand Tower Mining, Manufacturing and Transportation Company | IC | 1869 | 1882 | Grand Tower and Carbondale Railroad | ||
| Grand Trunk Junction Railway | CN | 1880 | 1901 | Grand Trunk Western Railway | ||
| Grand Trunk Western Railway | CN | 1900 | 1928 | Grand Trunk Western Railroad | ||
| Granite City and East St. Louis Terminal Railroad | 1906 | |||||
| Granite City and Madison Belt Line Railroad | 1892 | Terminal Railroad Association of St. Louis | ||||
| Grayville and Mattoon Railroad | IC | 1876 | 1880 | Peoria, Decatur and Evansville Railway | ||
| Grayville and Mattoon Railroad | IC | 1857 | 1871 | Chicago and Illinois Southern Railroad | ||
| Great Western Railroad | WAB | 1853 | 1865 | Toledo, Wabash and Western Railway | ||
| Groves and Sand Ridge Railroad | IC | 1902 | 1904 | Illinois Central Railroad | ||
| Gulf, Mobile and Ohio Railroad | GM&O, GMO | GM&O | 1940 | 1972 | Illinois Central Gulf Railroad | |
| Hamilton, Lacon and Eastern Railroad | GM&O | 1867 | 1870 | Chicago and Alton Railroad | ||
| Hammond Belt Railway | C&O | 1906 | N/A | |||
| Hammond and Blue Island Railroad | NYC | 1893 | 1896 | Chicago, Hammond and Western Railroad | ||
| Hancock County Bridge Company | 1865 | 1868 | Keokuk and Hamilton Bridge Company | |||
| Hannibal Bridge Company | WAB | 1869 | 1937 | Wabash – Hannibal Bridge Company | ||
| Hannibal and Naples Railroad | WAB | 1863 | 1877 | Wabash Railway | ||
| Hanover Railway | 1906 | 1934 | N/A | |||
| Havana, Rantoul and Eastern Railroad | IC | 1873 | 1887 | LeRoy and Eastern Railroad | ||
| Herrin Railway | MP | 1903 | 1909 | St. Louis, Iron Mountain and Southern Railway | ||
| Herrin and Johnson City Railway | MP | 1905 | 1909 | St. Louis, Iron Mountain and Southern Railway | ||
| Herrin Northern Railroad | IC | 1915 | 1946 | Illinois Central Railroad | ||
| Herrin and Southern Railroad | CB&Q | 1909 | 1914 | Chicago, Burlington and Quincy Railroad | ||
| Hooppole, Yorktown and Tampico Railroad | HY&T | 1922 | 1953 | N/A | ||
| Hooppole, Yorktown and Tampico Railroad | HY&T | 1913 | 1917 | Galesburg, Rockford and Northern Railroad | ||
| I&M Rail Link | IMRL | 1997 | 2002 | Iowa, Chicago and Eastern Railroad | ||
| Illinois Central Railroad | IC | IC | 1851 | 1972 | Illinois Central Gulf Railroad | |
| Illinois Central Gulf Railroad | ICG | 1972 | 1988 | Illinois Central Railroad | ||
| Illinois and Eastern Railroad | IC | 1899 | 1899 | Illinois and Indiana Railroad | ||
| Illinois Farmers' Railroad | CB&Q | 1867 | 1872 | Jacksonville, North Western and South Eastern Railway | ||
| Illinois Grand Trunk Railway | CB&Q | 1859 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Illinois and Indiana Railroad | IC | 1899 | 1906 | Indianapolis Southern Railroad | ||
| Illinois, Iowa and Minnesota Railway | MILW | 1902 | 1908 | Chicago, Milwaukee and Gary Railway | ||
| Illinois Midland Railway | 1913 | 1967 | N/A | |||
| Illinois Midland Railway | PRR | 1874 | 1886 | Terre Haute and Peoria Railroad | ||
| Illinois and Mississippi Valley Terminal Railroad | ITC | 1899 | 1899 | Illinois Terminal Railroad | ||
| Illinois–Missouri Terminal Railway | ITC | ITC | 1954 | 1956 | Illinois Terminal Railroad | |
| Illinois Northern Railroad | IN | ATSF | 1901 | 1975 | Atchison, Topeka and Santa Fe Railway | |
| Illinois Parallel Railroad | CNW | 1851 | 1853 | Chicago and Milwaukee Railroad | ||
| Illinois RailNet | IR | 1997 | 2005 | Illinois Railway | ||
| Illinois River Railroad | 1853 | 1864 | Peoria, Pekin and Jacksonville Railroad | |||
| Illinois and St. Louis Bridge Company | 1867 | 1878 | St. Louis Bridge Company | |||
| Illinois and St. Louis Railroad and Coal Company | SOU | 1865 | 1889 | Louisville, Evansville and St. Louis Consolidated Railroad | ||
| Illinois South Eastern Railway | B&O | 1867 | 1870 | Springfield and Illinois South Eastern Railway | ||
| Illinois Southern Railway | MP | 1900 | 1920 | Missouri–Illinois Railroad | ||
| Illinois and Southern Iowa Railroad | WAB | 1857 | 1865 | Toledo, Wabash and Western Railway | ||
| Illinois Terminal Company | ITC | 1922 | 1937 | Illinois Terminal Railroad | ||
| Illinois Terminal Railroad | ITC | ITC | 1956 | 1981 | Norfolk and Western Railway | |
| Illinois Terminal Railroad | ITC | ITC | 1937 | 1954 | Illinois–Missouri Terminal Railway | |
| Illinois Terminal Railroad | ITC | 1895 | 1922 | Illinois Terminal Company | ||
| Illinois Transfer Railroad | 1899 | Terminal Railroad Association of St. Louis | ||||
| Illinois Valley Belt Railroad | 1902 | |||||
| Illinois Valley and Northern Railroad | CB&Q | 1887 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Illinois and Wisconsin Railroad | CNW | 1851 | 1855 | Chicago, St. Paul and Fond du Lac Railroad | ||
| Indiana, Bloomington and Western Railway | NYC | 1879 | 1887 | Pekin and Danville Railway | ||
| Indiana, Decatur and Western Railway | B&O | 1895 | 1902 | Cincinnati, Indianapolis and Western Railway | ||
| Indiana Harbor Railroad | NYC | 1907 | 1907 | Indiana Harbor Belt Railroad | ||
| Indiana Hi-Rail Corporation | IHRC | 1986 | 1997 | N/A | ||
| Indiana and Illinois Central Railway | B&O | 1855 | 1875 | Springfield, Decatur and Indianapolis Railway | ||
| Indiana, Illinois and Iowa Railroad | NYC | 1881 | 1906 | Chicago, Indiana and Southern Railroad | ||
| Indiana and Illinois Southern Railroad | IC | 1882 | 1890 | St. Louis, Indianapolis and Eastern Railroad | ||
| Indiana and Western Railway | NYC | 1887 | 1887 | Ohio, Indiana and Western Railway | ||
| Indianapolis, Bloomington and Western Railway | IC, NYC | 1869 | 1879 | Champaign, Havana and Western Railway, Danville and Pekin Railway | ||
| Indianapolis, Crawfordsville and Danville Railroad | NYC | 1868 | 1869 | Indianapolis, Bloomington and Western Railway | ||
| Indianapolis, Decatur and Springfield Railway | B&O | 1875 | 1887 | Indianapolis, Quincy and Missouri River Railway | ||
| Indianapolis, Decatur and Western Railway | B&O | 1888 | 1894 | Decatur and Eastern Railway | ||
| Indianapolis, Quincy and Missouri River Railway | B&O | 1887 | 1888 | Indianapolis, Decatur and Western Railway | ||
| Indianapolis and St. Louis Railroad | NYC | 1869 | 1882 | Indianapolis and St. Louis Railway | ||
| Indianapolis and St. Louis Railway | NYC | 1882 | 1889 | Cleveland, Cincinnati, Chicago and St. Louis Railway | ||
| Indianapolis Southern Railroad | IC | 1906 | 1911 | Illinois Central Railroad | ||
| Iowa Railroad | IRRC | 1981 | 1984 | Iowa Interstate Railroad | ||
| Iowa Central Railway | MSTL | 1888 | 1912 | Minneapolis and St. Louis Railroad | ||
| Iowa, Chicago and Eastern Railroad | ICE | 2002 | 2008 | Dakota, Minnesota and Eastern Railroad | ||
| Iron Mountain, Chester and Eastern Railroad | MP | 1873 | 1878 | Wabash, Chester and Western Railroad | ||
| Jacksonville, Alton and St. Louis Railroad | GM&O | 1857 | 1862 | St. Louis, Jacksonville and Chicago Railroad | ||
| Jacksonville and Carrollton Railroad | GM&O | 1851 | 1857 | Jacksonville, Alton and St. Louis Railroad | ||
| Jacksonville and Concord Railway | CB&Q | 1903 | 1904 | Jacksonville and St. Louis Railway | ||
| Jacksonville and Havana Railroad | 1925 | 1938 | N/A | |||
| Jacksonville, Louisville and St. Louis Railway | CB&Q | 1890 | 1896 | Jacksonville and St. Louis Railway | ||
| Jacksonville, North Western and South Eastern Railway | CB&Q | 1867 | 1879 | Jacksonville Southeastern Railway | ||
| Jacksonville and St. Louis Railway | CB&Q | 1896 | 1905 | Chicago, Burlington and Quincy Railroad | ||
| Jacksonville and Savanna Railroad | CB&Q | 1855 | 1861 | Chicago, Burlington and Quincy Railroad | ||
| Jacksonville Southeastern Railway | CB&Q | 1879 | 1890 | Jacksonville, Louisville and St. Louis Railway | ||
| Johnston City Connecting Railway | MP | 1911 | 1913 | St. Louis, Iron Mountain and Southern Railway | ||
| Johnston City Southern Railroad | IC | 1914 | ||||
| Joliet, Aurora and Northern Railway | EJ&E | 1884 | 1888 | Elgin, Joliet and Eastern Railway | ||
| Joliet and Blue Island Railway | EJ&E | 1889 | 1938 | Elgin, Joliet and Eastern Railway | ||
| Joliet and Chicago Railroad | GM&O | 1855 | 1950 | Gulf, Mobile and Ohio Railroad | ||
| Joliet Junction Railroad | 1994 | 1999 | ||||
| Joliet and Northern Indiana Railroad | NYC | 1854 | 1976 | Consolidated Rail Corporation | ||
| Joliet, Rockford and Northern Railroad | CB&Q | 1881 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Joliet and Terre Haute Railroad | CB&Q | 1852 | 1859 | Illinois Grand Trunk Railway | ||
| Joliet Union Depot Company | ATSF/ GM&O/ RI | 1911 | ||||
| Junction Railway | CNW | 1889 | 1891 | Chicago and North Western Railway | ||
| Kankakee and Illinois River Railroad | NYC | 1869 | 1870 | Plymouth, Kankakee and Pacific Railroad | ||
| Kankakee and Indiana Railroad | NYC | 1869 | 1873 | Cincinnati, Lafayette and Chicago Railroad | ||
| Kankakee and Seneca Railroad | NYC/ RI | 1881 | 1933 | N/A | ||
| Kankakee and South Western Railroad | IC | 1880 | 1902 | Illinois Central Railroad | ||
| Kankakee and South-Western Coal Branch Railroad | IC | 1882 | 1883 | Kankakee and South Western Railroad | ||
| Kankakee and Southwestern Railroad | IC | 1878 | 1880 | Kankakee and South Western Railroad | ||
| Kankakee and Western Railroad | IC | 1879 | 1880 | Kankakee and South Western Railroad | ||
| Kansas and Sidell Railroad | 1919 | 1938 | N/A | |||
| Keithsburg Bridge Company | MSTL | 1885 | 1901 | Iowa Central Railway | ||
| Keithsburg and Eastern Railroad | MSTL | 1873 | 1880 | Peoria and Farmington Railway | ||
| Kenosha and Rockford Railroad | CNW | 1856 | 1857 | Kenosha, Rockford and Rock Island Railroad | ||
| Kenosha, Rockford and Rock Island Railroad | CNW | 1864 | 1864 | Dixon, Rockford and Kenosha Railway | ||
| Kenosha and State Line Railroad | CNW | 1857 | 1864 | Kenosha, Rockford and Rock Island Railroad | ||
| Kensington and Eastern Railroad | IC | 1904 | 1996 | Chicago South Shore and South Bend Railroad | ||
| Keokuk and Hamilton Bridge Company | 1868 | |||||
| LaFayette, Bloomington and Mississippi Railroad | NKP | 1876 | 1879 | LaFayette, Bloomington and Muncie Railway | ||
| LaFayette, Bloomington and Mississippi Railway | NKP | 1867 | 1876 | LaFayette, Bloomington and Mississippi Railroad | ||
| LaFayette, Bloomington and Muncie Railway | NKP | 1879 | 1879 | Lake Erie and Western Railway | ||
| LaFayette, Muncie and Bloomington Railroad | NKP | 1876 | 1879 | Muncie and State Line Railroad | ||
| LaGrange Connecting Railroad | NYC | |||||
| La Salle and Bureau County Railroad | LSBC | 1890 | 1985 | Chicago Rail Link | ||
| La Salle and Chicago Railroad | B&O | 1867 | 1873 | Chicago and Great Western Railroad | ||
| Lake Erie and Mississippi Railway | NKP | 1884 | 1885 | Lake Erie and Western Railway | ||
| Lake Erie and Western Railroad | NKP | 1887 | 1923 | New York, Chicago and St. Louis Railroad | ||
| Lake Erie and Western Railway | NKP | 1879 | 1886 | Lake Erie and Western Railroad | ||
| Lake Shore and Michigan Southern Railway | NYC | 1869 | 1914 | New York Central Railroad | ||
| Lee County Railway | CNW | 1906 | 1910 | Chicago and North Western Railway | ||
| LeRoy and Eastern Railroad | IC | 1886 | 1887 | Rantoul Railroad | ||
| Le Roy Narrow Gauge Railroad | IC | 1876 | 1878 | Havana, Rantoul and Eastern Railroad | ||
| Libertyville Railway | MILW | 1878 | 1881 | Chicago, Milwaukee and St. Paul Railway | ||
| Litchfield, Carrollton and Western Railroad | GM&O | 1882 | 1892 | Litchfield, Carrollton and Western Railway | ||
| Litchfield, Carrollton and Western Railway | GM&O | 1889 | 1899 | Quincy, Carrollton and St. Louis Railway | ||
| Litchfield and Madison Railway | LM | CNW | 1900 | 1958 | Chicago and North Western Railway | |
| Litchfield and St. Louis Railway | IC | 1886 | 1887 | St. Louis and Chicago Railway | ||
| Logansport, Peoria and Burlington Railroad | TP&W | 1861 | 1864 | Toledo, Peoria and Warsaw Railway | ||
| Louisiana and Pike County Railroad | WAB | 1867 | 1984 | N/A | ||
| Louisville, Evansville and St. Louis Railroad | SOU | 1886 | 1889 | Louisville, Evansville and St. Louis Consolidated Railroad | ||
| Louisville, Evansville and St. Louis Railway | SOU | 1882 | 1886 | Louisville, Evansville and St. Louis Railroad | ||
| Louisville, Evansville and St. Louis Consolidated Railroad | SOU | 1889 | 1900 | Southern Railway of Illinois | ||
| Louisville and Nashville Railroad | L&N, LN | L&N | 1880 | 1983 | Seaboard System Railroad | |
| Louisville, New Albany and Chicago Railway | MON | 1884 | 1897 | Chicago, Indianapolis and Louisville Railway | ||
| Louisville, New Albany and St. Louis Railway | SOU | 1878 | 1882 | Louisville, Evansville and St. Louis Railway | ||
| Louisville, New Albany and St. Louis Air Line Railway | SOU | 1872 | 1877 | St. Louis and Mount Carmel Railway | ||
| Louisville and St. Louis Railway | SOU | 1886 | 1897 | Louisville, Evansville and St. Louis Consolidated Railroad | ||
| Lowell and Southern Railroad | CB&Q | 1925 | N/A | |||
| Lyons and Chicago Railroad | B&O | 1897 | ||||
| Macomb, Industry and Littleton Railway | 1913 | 1930 | N/A | |||
| Macomb, Vermont and Bath Railroad | CB&Q | 1853 | 1854 | Peoria and Hannibal Railroad | ||
| Macomb and Western Illinois Railway | 1901 | 1911 | Macomb, Industry and Littleton Railway | |||
| Macoupin County Railway | CNW | 1903 | 1912 | St. Louis, Peoria and North Western Railway | ||
| Macoupin County Extension Railway | CNW | 1913 | 1920 | Chicago and North Western Railway | ||
| Madison County Railroad | WAB | 1865 | 1871 | Wabash Railway | ||
| Madison, Illinois and St. Louis Railway | 1891 | 1941 | Madison, Illinois and St. Louis Railroad | |||
| Madison, Illinois and St. Louis Railroad | 1941 | 1953 | St. Louis Merchants Bridge Terminal Railway | |||
| Marion and Eastern Railroad | MP | 1913 | 1956 | Missouri Pacific Railroad | ||
| Marion and Harrisburg Railway | MP | 1905 | 1913 | St. Louis, Iron Mountain and Southern Railway | ||
| Marion and Johnston City Railway | MP | 1905 | 1913 | St. Louis, Iron Mountain and Southern Railway | ||
| Marquette, Spring Valley and Northwestern Railroad | 1901 | 1907 | Illinois Valley Railway (electric) | |||
| Mattoon and Evansville Railroad | IC | 1900 | 1902 | Illinois Central Railroad | ||
| Mercer County Bridge Company | MSTL | 1881 | 1885 | Keithsburg Bridge Company | ||
| Michigan Air Line Railroad | 1869 | 1871 | Chicago and Canada Southern Railway | |||
| Michigan Central Railroad | MC | NYC | 1852 | 1976 | Consolidated Rail Corporation | |
| The Milwaukee Road, Inc. | MILW | MILW | 1985 | 1986 | Soo Line Railroad | |
| Milwaukee and Madison Railway | CNW | 1880 | 1881 | Chicago, Milwaukee and North Western Railway | ||
| Michigan Southern and Northern Indiana Railroad | NYC | 1855 | 1869 | Lake Shore and Michigan Southern Railway | ||
| Milwaukee and State Line Railway | CNW | 1905 | 1909 | Chicago and North Western Railway | ||
| Minneapolis and St. Louis Railroad | MSTL | 1912 | 1943 | Minneapolis and St. Louis Railway | ||
| Minneapolis and St. Louis Railway | MSTL | MSTL | 1939 | 1960 | Chicago and North Western Railway | |
| Minneapolis, St. Paul and Sault Ste. Marie Railroad | SOO | CP | 1944 | 1961 | Soo Line Railroad | |
| Minneapolis, St. Paul and Sault Ste. Marie Railway | SOO | CP | 1909 | 1944 | Minneapolis, St. Paul and Sault Ste. Marie Railroad | |
| Minnesota and Northwestern Railroad | CGW | 1886 | 1894 | Chicago Great Western Railway | ||
| Mississippi Railroad | MILW | 1865 | 1865 | Northern Illinois Railroad | ||
| Mississippi River Bridge Company | GM&O | 1873 | 1895 | Chicago and Alton Railroad | ||
| Mississippi River Railroad and Toll Bridge Company | ATSF | 1886 | 1900 | Atchison, Topeka and Santa Fe Railway | ||
| Mississippi and Rock River Junction Railroad | CNW | 1851 | 1855 | Galena and Chicago Union Railroad | ||
| Mississippi and Wabash Railroad | TP&W | 1853 | 1865 | Toledo, Peoria and Warsaw Railway | ||
| Missouri–Illinois Railroad | MI | MP | 1921 | 1978 | Missouri Pacific Railroad | |
| Missouri and Illinois Bridge and Belt Railroad Company | CB&Q | 1904 | 1966 | Chicago, Burlington and Quincy Railroad | ||
| Missouri Pacific Railroad | MP | MP | 1918 | 1997 | Union Pacific Railroad | |
| Missouri Pacific Railroad in Illinois | MP | 1917 | 1918 | Missouri Pacific Railroad | ||
| Missouri Pacific Railway | 1881 | 1890 | Terminal Railroad Association of St. Louis | |||
| Mobile and Ohio Railroad | GM&O | 1886 | 1940 | Gulf, Mobile and Ohio Railroad | ||
| Moline and Peoria Railway | CB&Q/ MILW | 1900 | 1901 | Davenport, Rock Island and North Western Railway | ||
| Moline and Southeastern Narrow Gauge Railway | 1878 | 1885 | N/A | |||
| Momence and State Line Railroad | C&EI | 1887 | 1888 | Chicago and Eastern Illinois Railroad | ||
| Monon Railroad | MON | MON | 1956 | 1971 | Louisville and Nashville Railroad | |
| Morris Terminal Railway | RI | 1905 | 1948 | Chicago, Rock Island and Pacific Railroad | ||
| Mound City Railroad | IC | 1855 | 1885 | Mound City Railway | ||
| Mound City Railway | IC | 1882 | 1902 | Illinois Central Railroad | ||
| Mounds and Olive Branch Railroad | IC | 1902 | 1903 | Illinois Central Railroad | ||
| Mount Carbon Coal Railroad | IC | 1861 | 1869 | Grand Tower Mining, Manufacturing and Transportation Company | ||
| Mount Carmel and Alton Railroad | WAB | 1836 | 1865 | Madison County Railroad | ||
| Mount Olive Coal Railroad | IC | 1888 | 1888 | St. Louis and Chicago Railroad | ||
| Mount Vernon Railroad | L&N | 1855 | 1869 | St. Louis and Southeastern Railway | ||
| Muncie and State Line Railroad | NKP | 1879 | 1879 | LaFayette, Bloomington and Muncie Railway | ||
| Murphysboro and Shawneetown Railroad | IC | 1867 | 1869 | Carbondale and Shawneetown Railroad | ||
| Nauvoo and Warsaw Railroad | MILW | 1847 | 1849 | Warsaw and Rockford Railroad | ||
| New Castle and Danville Railroad | NYC | 1854 | 1869 | Indianapolis, Crawfordsville and Danville Railroad | ||
| New York Central Railroad | NYC | NYC | 1914 | 1968 | Penn Central Transportation Company | |
| New York and Chicago Railway | NKP | 1881 | 1881 | New York, Chicago and St. Louis Railway | ||
| New York, Chicago and St. Louis Railroad | NKP | NKP | 1887 | 1964 | Norfolk and Western Railway | |
| New York, Chicago and St. Louis Railway | NKP | 1881 | 1887 | Chicago and State Line Railroad | ||
| Norfolk and Western Railway | N&W, NW | 1964 | 1998 | Norfolk Southern Railway | ||
| North and South Railroad of Illinois | IC | 1890 | 1896 | St. Louis, Peoria and Northern Railway | ||
| North Western Grand Trunk Railway | CN | 1879 | 1880 | Chicago and Grand Trunk Railway | ||
| Northern Cross Railroad | CB&Q | 1849 | 1857 | Quincy and Chicago Railroad | ||
| Northern Cross Railroad and Transportation Company | WAB | 1843 | 1847 | Sangamon and Morgan Railroad | ||
| Northern Illinois Railroad | MILW | 1859 | 1866 | Western Union Railroad | ||
| Northern Illinois Railway | CNW | 1884 | 1888 | Chicago and North Western Railway | ||
| Northern Indiana Railroad | NYC | 1855 | 1855 | Michigan Southern and Northern Indiana Railroad | ||
| Northern Indiana and Chicago Railroad | NYC | 1850 | 1855 | Northern Indiana Railroad | ||
| Northern Pacific Railroad | NP | 1890 | 1893 | N/A | Leased the Wisconsin Central Company | |
| Northern and Southern Illinois Railroad | CB&Q | 1904 | 1908 | Chicago, Burlington and Quincy Railroad | ||
| Ogle and Carroll County Railroad | CB&Q | 1857 | 1871 | Chicago and Iowa Railroad | ||
| Oglesby and Granville Railway | MILW | 1905 | 1913 | Chicago, Milwaukee and St. Paul Railway | ||
| Ohio, Indiana and Western Railway | NYC | 1887 | 1890 | Peoria and Eastern Railway | ||
| Ohio and Mississippi Railroad | B&O | 1851 | 1862 | Ohio and Mississippi Railway | ||
| Ohio and Mississippi Railway | B&O | 1861 | 1893 | Baltimore and Ohio Southwestern Railway | ||
| Orion and Minersville Railroad | CB&Q | 1872 | 1875 | St. Louis, Rock Island and Chicago Railroad | ||
| Ottawa, Oswego and Fox River Valley Railroad | CB&Q | 1852 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Paducah and Illinois Railroad | PI | CB&Q/ IC/ L&N | 1910 | Still exists as a joint subsidiary of the BNSF Railway, Canadian National Railway, and CSX Transportation | ||
| Palatine, Lake Zurich and Wauconda Railroad | 1918 | 1921 | Chicago, Palatine and Wauconda Railroad | |||
| Pana, Springfield and North Western Railroad | B&O | 1865 | 1870 | Springfield and Illinois South Eastern Railway | ||
| Paris and Danville Railroad | NYC | 1869 | 1881 | Danville and Southwestern Railroad | ||
| Paris and Decatur Railroad | PRR | 1861 | 1874 | Peoria, Atlanta and Decatur Railroad | ||
| Paris and Terre Haute Railroad | PRR | 1873 | 1874 | Peoria, Atlanta and Decatur Railroad | ||
| Pawnee Railroad | 1888 | 1905 | Central Illinois Railway | |||
| Peabody Short Line Railroad | IC | 1958 | 1961 | Illinois Central Railroad | ||
| Pekin and Danville Railway | NYC | 1887 | 1887 | Indiana and Western Railway | ||
| Pekin, Lincoln and Decatur Railroad | IC | 1861 | 1876 | Pekin, Lincoln and Decatur Railway | ||
| Pekin, Lincoln and Decatur Railway | IC | 1876 | 1879 | Peoria, Decatur and Evansville Railway | ||
| Peninsular Railway | CN | 1869 | 1873 | Chicago and Lake Huron Railroad | ||
| Penn Central Transportation Company | PC | 1968 | 1976 | Consolidated Rail Corporation | ||
| Penndel Company | PRR | 1954 | 1976 | Consolidated Rail Corporation | ||
| Pennsylvania Company | PRR | 1871 | 1918 | Pennsylvania Railroad | ||
| Pennsylvania Railroad | PRR | PRR | 1918 | 1968 | Penn Central Transportation Company | |
| Peoria, Atlanta and Decatur Railroad | PRR | 1869 | 1874 | Illinois Midland Railway | ||
| Peoria and Bureau Valley Railroad | RI | 1853 | 1980 | Baltimore and Ohio Railroad | ||
| Peoria and Burlington Railroad | CB&Q | 1863 | 1864 | Chicago, Burlington and Quincy Railroad | ||
| Peoria, Decatur and Evansville Railway | B&O, IC | 1879 | 1900 | Illinois Central Railroad, Indiana, Decatur and Western Railway, Mattoon and Evansville Railroad, Peoria, Decatur and Mattoon Railroad | ||
| Peoria, Decatur and Mattoon Railroad | IC | 1900 | 1905 | Illinois Central Railroad | ||
| Peoria and Eastern Railway | PAE, PE | NYC | 1890 | 1976 | Consolidated Rail Corporation | |
| Peoria and Farmington Railway | MSTL | 1869 | 1882 | Central Iowa Railway | ||
| Peoria, Hanna City and Western Railway | RI | 1918 | 1951 | N/A | ||
| Peoria and Hannibal Railroad | CB&Q | 1854 | 1868 | Chicago, Burlington and Quincy Railroad, Peoria, Pekin and Jacksonville Railroad | ||
| Peoria and North-Western Railway | CNW | 1900 | 1901 | Chicago and North Western Railway | ||
| Peoria and Oquawka Railroad | TP&W | 1849 | 1861 | Logansport, Peoria and Burlington Railroad | ||
| Peoria, Pekin and Jacksonville Railroad | 1863 | 1881 | Wabash, St. Louis and Pacific Railway | |||
| Peoria and Pekin Terminal Railway | RI | 1899 | 1907 | Peoria Railway Terminal Company | ||
| Peoria and Pekin Traction Company | RI | 1897 | 1899 | Peoria and Pekin Terminal Railway | ||
| Peoria Railway Terminal Company | RI | 1906 | 1926 | Peoria Terminal Company | ||
| Peoria and Rock Island Railway | RI | 1867 | 1877 | Rock Island and Peoria Railway | ||
| Peoria and Springfield Railroad | CNW/ IC/ NKP/ NYC/ PRR | 1859 | 1882 | Peoria and Pekin Union Railway | ||
| Peoria Terminal Company | PT, PTC | RI | 1926 | 1980 | ||
| Peoria Terminal Railway | RI | 1885 | 1903 | Rock Island and Peoria Railway | ||
| Pere Marquette Railroad | PM | 1903 | 1917 | Pere Marquette Railway | ||
| Pere Marquette Railway | PM | PM | 1917 | 1947 | Chesapeake and Ohio Railway | |
| Peru, La Salle and Deer Park Railroad | 1905 | 1934 | N/A | |||
| Petersburg and Springfield Railroad | GM&O | 1853 | 1854 | Sangamon and North West Railroad | ||
| Philadelphia, Baltimore and Washington Railroad | PRR | 1956 | 1976 | Consolidated Rail Corporation | ||
| Pike County Bridge Company | WAB | 1867 | 1869 | Hannibal Bridge Company | ||
| Pike County Railroad | WAB | 1857 | 1865 | Hannibal and Naples Railroad | ||
| Pittsburgh Railroad and Coal Company | SOU | 1859 | 1865 | Illinois and St. Louis Railroad and Coal Company | ||
| Pittsburgh, Cincinnati, Chicago and St. Louis Railroad | PRR | 1917 | 1956 | Philadelphia, Baltimore and Washington Railroad | ||
| Pittsburgh, Cincinnati, Chicago and St. Louis Railway | PRR | 1890 | 1917 | Pittsburgh, Cincinnati, Chicago and St. Louis Railroad | ||
| Pittsburgh, Fort Wayne and Chicago Railroad | PRR | 1856 | 1861 | Pittsburgh, Fort Wayne and Chicago Railway | ||
| Pittsburgh, Fort Wayne and Chicago Railway | PRR | 1861 | 1976 | Consolidated Rail Corporation | ||
| Plymouth, Kankakee and Pacific Railroad | NYC | 1870 | 1881 | Indiana, Illinois and Iowa Railroad | ||
| Polk and Forty-ninth Streets Junction Railway | CN | 1889 | 1889 | Grand Trunk Junction Railway | ||
| Prairie Central Railway | PACY | 1981 | N/A | |||
| Prairie Trunk Railway | PARY | 1977 | 1984 | N/A | ||
| Preemption Eastern Railroad | RI | 1893 | 1903 | Rock Island and Peoria Railway | ||
| Pullman Railroad | PLM | RI | 1906 | 1980 | Norfolk and Western Railway | |
| Quincy, Alton and St. Louis Railway | CB&Q | 1867 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Quincy, Carrollton and St. Louis Railway | GM&O | 1899 | 1904 | Chicago and Alton Railroad | ||
| Quincy and Chicago Railroad | CB&Q | 1857 | 1864 | Chicago, Burlington and Quincy Railroad | ||
| Quincy, Missouri and Pacific Railroad | CB&Q | 1869 | 1886 | Quincy, Omaha and Kansas City Railway | ||
| Quincy, Omaha and Kansas City Railroad | CB&Q | 1897 | 1939 | Chicago, Burlington and Quincy Railroad | ||
| Quincy, Omaha and Kansas City Railway | CB&Q | 1887 | 1897 | Quincy, Omaha and Kansas City Railroad | ||
| Quincy Railroad Bridge Company | CB&Q | 1867 | 1903 | Chicago, Burlington and Quincy Railroad | ||
| Quincy and Toledo Railroad | WAB | 1857 | 1865 | Toledo, Wabash and Western Railway | ||
| Quincy and Warsaw Railroad | CB&Q | 1865 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| Racine and Mississippi Railroad | MILW | 1855 | 1868 | Western Union Railroad | ||
| Railroad Bridge Company | CB&Q | 1853 | 1867 | Quincy Railroad Bridge Company | ||
| Randolph County Railroad | MP | 1894 | 1895 | Centralia and Chester Railroad | ||
| Rantoul Railroad | IC | 1887 | 1903 | Illinois Central Railroad | ||
| Riverside and Harlem Railroad | IC | 1901 | 1902 | Illinois Central Railroad | ||
| Rochelle and Southern Railway | MILW | 1902 | 1913 | Chicago, Milwaukee and St. Paul Railway | ||
| Rock Island and Alton Railroad | CB&Q | 1855 | 1859 | St. Louis, Alton and Rock Island Railroad | ||
| Rock Island and Eastern Illinois Railway | CB&Q/ MILW | 1896 | 1900 | Davenport, Rock Island and Northwestern Railway | ||
| Rock Island and La Salle Railroad | RI | 1847 | 1851 | Chicago and Rock Island Railroad | ||
| Rock Island and Mercer County Railroad | RI | 1876 | 1903 | Rock Island and Peoria Railway | ||
| Rock Island and Peoria Railroad | RI | 1855 | 1869 | Peoria and Rock Island Railway | ||
| Rock Island and Peoria Railway | RI | 1877 | 1908 | Chicago, Rock Island and Pacific Railway | ||
| Rockdale, Joliet and Lockport Terminal Railway | EJ&E | 1905 | Elgin, Joliet and Eastern Railway | |||
| Rockford Railroad | IC | 1906 | 1906 | Illinois Central Railroad | ||
| Rockford Belt Railway | MILW | 1905 | 1908 | Chicago, Milwaukee and Gary Railway | ||
| Rockford Central Railroad | MILW | 1869 | 1873 | Chicago and Superior Railroad | ||
| Rockford Central Railroad | CNW | 1855 | 1856 | Kenosha and Rockford Railroad | ||
| Rockford and Mississippi Railroad | CNW | 1857 | 1857 | Kenosha and State Line Railroad | ||
| Rockford, Rock Island and St. Louis Railroad | CB&Q | 1876 | 1899 | St. Louis, Rock Island and Chicago Railroad | ||
| Rockton and Freeport Railroad | MILW | 1853 | 1855 | Racine and Mississippi Railroad | ||
| Rossville and Eastern Railroad | C&EI | 1902 | 1903 | Chicago and Eastern Illinois Railroad | ||
| Rossville and Indiana Railroad | C&EI | 1872 | 1872 | Chicago, Danville and Vincennes Railroad | ||
| Rutland, Toluca and Northern Railroad | GM&O | 1909 | 1938 | N/A | ||
| St. Charles Railroad | CNW | 1859 | 1881 | Elgin and State Line Railroad | ||
| St. Charles Branch Railroad | CNW | 1849 | 1853 | Chicago, St. Charles and Mississippi Air Line Railroad | ||
| St. Clair Railroad | SOU | 1841 | 1853 | St. Clair Railroad and Coal Company | ||
| St. Clair Railroad and Coal Company | SOU | 1853 | 1857 | Pittsburgh Railroad and Coal Company | ||
| St. Clair Coal Railway | PRR | 1904 | 1908 | Vandalia Railroad | ||
| St. Clair, Madison and St. Louis Belt Railroad | CB&Q | 1890 | 1904 | Missouri and Illinois Bridge and Belt Railroad Company | ||
| St. Francisville and Lawrenceville Railroad | NYC | 1879 | 1881 | Wabash, St. Louis and Pacific Railway | ||
| St. Louis, Alton and Chicago Railroad | GM&O | 1857 | 1862 | Chicago and Alton Railroad | ||
| St. Louis, Alton and Rock Island Railroad | CB&Q | 1859 | 1868 | Rockford, Rock Island and St. Louis Railroad | ||
| St. Louis, Alton and Springfield Railroad | 1887 | 1892 | St. Louis, Chicago and St. Paul Railroad | |||
| St. Louis, Alton and Terre Haute Railroad | IC, NYC | 1862 | 1904 | Illinois Central Railroad | ||
| St. Louis and Belleville Electric Railway | IC | 1897 | 1958 | Peabody Short Line Railroad | Electric until 1949 | |
| St. Louis, Belleville and Southern Railway | IC | 1895 | 1946 | Illinois Central Railroad | ||
| St. Louis Bridge Company | 1878 | Terminal Railroad Association of St. Louis | ||||
| St. Louis and Cairo Railroad | GM&O | 1881 | 1913 | Mobile and Ohio Railroad | ||
| St. Louis Central Railway | IC | 1881 | 1886 | St. Louis Southern Railroad | ||
| St. Louis and Central Illinois Railroad | 1886 | 1888 | St. Louis, Alton and Springfield Railroad | |||
| St. Louis and Chicago Railroad | IC | 1888 | 1889 | St. Louis and Chicago Railway | ||
| St. Louis and Chicago Railway | IC | 1885 | 1889 | North and South Railroad of Illinois | ||
| St. Louis, Chicago and Peoria Railway | IC | 1886 | 1886 | St. Louis and Chicago Railway | ||
| St. Louis, Chicago and St. Paul Railroad | 1892 | 1897 | St. Louis, Chicago and St. Paul Railway of Illinois | |||
| St. Louis, Chicago and St. Paul Railway of Illinois | 1897 | 1900 | Chicago, Peoria and St. Louis Railway of Illinois | |||
| St. Louis Coal Railroad | IC | 1881 | 1886 | St. Louis Southern Railroad | ||
| St. Louis Connecting Railroad | PRR | 1925 | 1931 | Pittsburgh, Cincinnati, Chicago and St. Louis Railroad | ||
| St. Louis and Eastern Railway | IC | 1889 | 1896 | St. Louis, Peoria and Northern Railway | ||
| St. Louis and Illinois Belt Railway | ITC | 1905 | 1937 | Illinois Terminal Railroad | ||
| St. Louis and Illinois Bridge Company | 1865 | 1868 | Illinois and St. Louis Bridge Company | |||
| St. Louis, Indianapolis and Eastern Railroad | IC | 1889 | 1899 | Illinois and Eastern Railroad | ||
| St. Louis, Iron Mountain and Southern Railway | MP | 1901 | 1917 | Missouri Pacific Railroad in Illinois | ||
| St. Louis, Jacksonville and Chicago Railroad | GM&O | 1862 | 1899 | Chicago and Alton Railroad | ||
| St. Louis, Jerseyville and Springfield Railroad | 1880 | 1888 | St. Louis, Alton and Springfield Railroad | |||
| St. Louis Merchants Bridge Company | 1886 | 1920 | St. Louis Merchants Bridge Terminal Railway | |||
| St. Louis Merchants Bridge Terminal Railway | SLMB | 1887 | Terminal Railroad Association of St. Louis | |||
| St. Louis and Mount Carmel Railway | SOU | 1878 | 1878 | Louisville, New Albany and St. Louis Railway | ||
| St. Louis, Mount Carmel and New Albany Railroad | SOU | 1869 | 1872 | Louisville, New Albany and St. Louis Air Line Railway | ||
| St. Louis and O'Fallon Railway | SLOF | C&EI | 1896 | 1954 | Chicago and Eastern Illinois Railroad | |
| St. Louis and Ohio River Railroad | MP/ SSW | 1920 | 1948 | Alton and Southern Railroad | ||
| St. Louis and Ohio River Railroad | IC | 1901 | 1903 | Illinois Central Railroad | ||
| St. Louis and Peoria Railroad | IC | 1889 | 1896 | St. Louis, Peoria and Northern Railway | ||
| St. Louis, Peoria and North Western Railway | CNW | 1911 | 1913 | Chicago and North Western Railway | ||
| St. Louis, Peoria and Northern Railway | GM&O, IC | 1898 | 1900 | Chicago and Alton Railway, Illinois Central Railroad | ||
| St. Louis, Rock Island and Chicago Railroad | CB&Q | 1876 | 1899 | Chicago, Burlington and Quincy Railroad | ||
| St. Louis and South Eastern Railway | L&N | 1872 | 1879 | South East and St. Louis Railway | ||
| St. Louis and Southeastern Railroad | L&N | 1871 | 1871 | St. Louis and Southeastern Railway | ||
| St. Louis and Southeastern Railway | L&N | 1871 | 1872 | St. Louis and South Eastern Railway | ||
| St. Louis and Southeastern Railway | L&N | 1869 | 1871 | St. Louis and Southeastern Railroad | ||
| St. Louis Southern Railroad | IC | 1886 | 1897 | St. Louis, Alton and Terre Haute Railroad | ||
| St. Louis and Southern Illinois Railroad | MP | 1901 | 1902 | Illinois Southern Railway | ||
| St. Louis Southwestern Railway | SSW | SSW | 1905 | 1997 | Union Pacific Railroad | |
| St. Louis, Springfield and Vincennes Railway | B&O | 1899 | 1899 | Cincinnati, Louisville and Vincennes Railway | ||
| St. Louis, Troy and Eastern Railroad | ITC | 1899 | 1937 | Illinois Terminal Railroad | ||
| St. Louis Valley Railway | MP | 1901 | 1903 | St. Louis, Iron Mountain and Southern Railway | ||
| St. Louis Valley Transfer Railway | MP | 1902 | 1903 | St. Louis Valley Railway | ||
| St. Louis, Vandalia and Terre Haute Railroad | PRR | 1865 | 1905 | Vandalia Railroad | ||
| Saline Valley Railway | NYC | 1907 | 1917 | Cleveland, Cincinnati, Chicago and St. Louis Railway | ||
| Sangamon and Morgan Railroad | WAB | 1845 | 1853 | Great Western Railroad | ||
| Sangamon and North West Railroad | GM&O | 1854 | 1859 | Alton and St. Louis Railroad | ||
| Savanna Branch Railroad | MILW | 1851 | 1856 | Racine and Mississippi Railroad | ||
| Seaboard System Railroad | SBD | 1983 | 1986 | CSX Transportation | ||
| SF&L Railway | SFAL | 2001 | 2002 | Toledo, Peoria and Western Railway | ||
| Shawneetown and Eldorado Railroad | L&N | 1861 | 1869 | St. Louis and Southeastern Railway | ||
| Sidell and Olney Railroad | 1915 | 1919 | Kansas and Sidell Railroad, Westfield Railroad, Yale Short Line Railroad | |||
| South Chicago Railroad | IC | 1881 | 1987 | Northeast Illinois Regional Commuter Railroad Corporation | ||
| South Chicago and Southern Railroad | PRR | 1881 | 1954 | Penndel Company | ||
| South Chicago and Western Indiana Railroad | C&EI/ CN/ ERIE/ MON/ WAB | 1880 | 1882 | Chicago and Western Indiana Railroad | ||
| South East and St. Louis Railway | L&N | 1880 | 1936 | Louisville and Nashville Railroad | ||
| South Wilmington and Southern Railroad | 1907 | 1918 | Chicago, Wilmington and Franklin Coal Company | |||
| Southern Railway | SOU | SOU | 1900 | 1990 | Norfolk Southern Railway | |
| Southern Railway of Illinois | SOU | 1900 | 1900 | Southern Railway | ||
| Southern Illinois and Kentucky Railroad | IC | 1925 | 1954 | Illinois Central Railroad | ||
| Southern Indiana Railway | MILW | 1908 | 1910 | Chicago, Terre Haute and Southeastern Railway | ||
| Sparta and Ste. Genevieve Railroad | MP | 1889 | 1894 | Centralia and Chester Railroad | ||
| SPCSL Corporation | SSWN | SSW | 1989 | 1997 | Union Pacific Railroad | |
| Springfield and Decatur Railway | B&O | 1901 | 1901 | Indiana, Decatur and Western Railway | ||
| Springfield, Decatur and Indianapolis Railway | B&O | 1875 | 1875 | Indianapolis, Decatur and Springfield Railway | ||
| Springfield, Effingham and South Eastern Railroad | IC | 1869 | 1883 | Indiana and Illinois Southern Railroad | ||
| Springfield, Havana and Peoria Railroad | 1926 | 1936 | Chicago and Illinois Midland Railway | |||
| Springfield and Illinois South Eastern Railway | B&O | 1870 | 1874 | Ohio and Mississippi Railway | ||
| Springfield and Northwestern Railroad | 1869 | 1878 | Springfield and Northwestern Railway | |||
| Springfield and Northwestern Railway | 1878 | 1881 | Wabash, St. Louis and Pacific Railway | |||
| Springfield and Pekin Railroad | CNW/ IC/ NKP/ NYC/ PRR | 1853 | 1859 | Peoria and Springfield Railroad | ||
| Springfield and Southwestern Railroad | 1942 | 1945 | N/A | |||
| Springfield Terminal Railway | SFT | 1908 | 1952 | N/A | ||
| Strawn and Indiana State Line Railroad | C&EI | 1880 | 1887 | Chicago and Eastern Illinois Railroad | ||
| Streator and Clinton Railroad | NYC | 1899 | 1900 | Indiana, Illinois and Iowa Railroad | ||
| Sycamore and Cortland Railroad | CNW | 1859 | 1888 | Chicago and North Western Railway | ||
| Tamaroa and Mount Vernon Railway | MP | 1891 | 1892 | Wabash, Chester and Western Railroad | ||
| Terminal Railroad | NYC | 1896 | 1907 | Indiana Harbor Railroad | ||
| Terminal Railroad of East St. Louis | 1880 | Terminal Railroad Association of St. Louis | ||||
| Terre Haute and Alton Railroad | NYC | 1851 | 1856 | Terre Haute, Alton and St. Louis Railroad | ||
| Terre Haute, Alton and St. Louis Railroad | NYC | 1856 | 1862 | St. Louis, Alton and Terre Haute Railroad | ||
| Terre Haute and Indianapolis Railroad | PRR | 1892 | 1905 | Vandalia Railroad | ||
| Terre Haute and Peoria Railroad | PRR | 1887 | 1957 | Penndel Company | ||
| Thayer Junction Railway | 1909 | 1918 | Chicago, Wilmington and Franklin Coal Company | |||
| Toledo, Charleston and St. Louis Railroad | NKP | 1886 | 1886 | Toledo, St. Louis and Kansas City Railroad | ||
| Toledo, Cincinnati and St. Louis Railroad | NKP | 1881 | 1884 | Toledo, Charleston and St. Louis Railroad | ||
| Toledo and East St. Louis Railroad | NKP | 1900 | 1900 | Toledo, St. Louis and Western Railroad | ||
| Toledo, Peoria and Warsaw Railway | TP&W | 1864 | 1880 | Toledo, Peoria and Western Railroad | ||
| Toledo, Peoria and Western Railroad | TP&W, TPW | TP&W | 1927 | 1983 | Atchison, Topeka and Santa Fe Railway | |
| Toledo, Peoria and Western Railroad | TP&W | 1879 | 1886 | Toledo, Peoria and Western Railway | ||
| Toledo, Peoria and Western Railway | TP&W | TP&W | 1887 | 1927 | Toledo, Peoria and Western Railroad | |
| Toledo, St. Louis and Kansas City Railroad | NKP | 1886 | 1900 | Toledo and East St. Louis Railroad | ||
| Toledo, St. Louis and Western Railroad | NKP | 1900 | 1923 | New York, Chicago and St. Louis Railroad | ||
| Toledo, Wabash and Western Railway | WAB | 1865 | 1876 | Wabash Railway | ||
| Toluca and Eastern Railroad | GM&O | 1897 | 1902 | Toluca, Marquette and Northern Railroad | ||
| Toluca, Marquette and Northern Railroad | GM&O | 1900 | 1909 | Rutland, Toluca and Northern Railroad | ||
| Tonica and Petersburg Railroad | GM&O | 1857 | 1862 | St. Louis, Jacksonville and Chicago Railroad | ||
| Tuscola, Charleston and Vincennes Railroad | NKP | 1867 | 1881 | Toledo, Cincinnati and St. Louis Railroad | ||
| Union Railroad | NYC | 1852 | 1881 | Michigan Central Railroad | ||
| Union Railway and Transit Company | 1874 | 1880 | Terminal Railroad of East St. Louis | |||
| Union Station Company | CB&Q/ MILW/ PRR | 1913 | 1915 | Chicago Union Station Company | ||
| Union Stock Yard and Transit Company of Chicago | NYC | 1865 | 1958 | Chicago River and Indiana Railroad | ||
| Vandalia Railroad | PRR | 1905 | 1917 | Pittsburgh, Cincinnati, Chicago and St. Louis Railroad | ||
| Venice and Carondelet Railway | SOU | 1880 | 1889 | Louisville, Evansville and St. Louis Consolidated Railroad | ||
| Vermilion and State Line Railroad | NKP | 1881 | 1881 | Toledo, Cincinnati and St. Louis Railroad | ||
| Wabash Railroad | WAB | WAB | 1942 | 1991 | Norfolk and Western Railway | |
| Wabash Railroad | WAB | 1889 | 1915 | Wabash Railway | ||
| Wabash Railway | WAB | 1915 | 1942 | Wabash Railroad | ||
| Wabash Railway | WAB | 1876 | 1879 | Wabash, St. Louis and Pacific Railway | ||
| Wabash, Chester and Western Railroad | MP | 1878 | 1928 | Chester and Mount Vernon Railroad | ||
| Wabash Eastern Railway of Illinois | WAB | 1889 | 1889 | Wabash Railroad | ||
| Wabash – Hannibal Bridge Company | WAB | 1937 | 1943 | Wabash Railroad | ||
| Wabash, St. Louis and Pacific Railway | WAB | 1879 | 1886 | Cairo, Vincennes and Chicago Railway, Chicago, Havana and Western Railroad, Chicago, Peoria and St. Louis Railway, Wabash Eastern Railway of Illinois | ||
| Wabash Southern Railway | MP | 1905 | 1909 | St. Louis, Iron Mountain and Southern Railway | ||
| Wabash Valley Railroad | WVRC | 1977 | 1981 | Prairie Central Railway | ||
| Wabash Western Railway | WAB | 1887 | 1889 | Wabash Railroad | ||
| Warsaw, Rock Island and Galena Railroad | MILW | 1863 | 1872 | Western Union Railroad | ||
| Warsaw and Rockford Railroad | MILW | 1849 | 1863 | Warsaw, Rock Island and Galena Railroad | ||
| Watertown Railroad | MILW | 1874 | 1876 | Western Union Railroad | ||
| Waukegan and Mississippi Valley Railway | 1893 | 1919 | American Steel and Wire Company | |||
| Waukegan, Rockford and Elgin Traction Company | 1909 | 1918 | Palatine, Lake Zurich and Wauconda Railroad | Operated by steam | ||
| Waukegan and Southwestern Railway | EJ&E | 1891 | Elgin, Joliet and Eastern Railway | |||
| Western Air Line Railroad | CB&Q | 1853 | 1859 | American Central Railway | ||
| Western Union Railroad | MILW | 1863 | 1900 | Chicago, Milwaukee and St. Paul Railway | ||
| Westfield Railroad | WSD | 1919 | 1926 | Casey and Kansas Railroad | ||
| Wisconsin and Calumet Railroad | WICT | 1985 | 1997 | Wisconsin and Southern Railroad | ||
| Wisconsin Central Company | CP | 1887 | 1899 | Wisconsin Central Railway | ||
| Wisconsin Central Railroad | CP | 1954 | 1961 | Soo Line Railroad | ||
| Wisconsin Central Railway | CP | 1897 | 1954 | Wisconsin Central Railroad | ||
| Wisconsin and Minnesota Railroad | CP | 1885 | 1888 | Wisconsin Central Company | ||
| Yale Short Line Railroad | 1919 | 1933 | N/A |
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Springfield (capital) | |
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List of United States railroads by political division | |
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