| Name | Mark | System[nb 1] | From | To | Successor | Notes |
| Alabama Central Railroad | | SOU | 1871 | 1881 | East Tennessee, Virginia and Georgia Railroad | |
| Alabama and Chattanooga Railroad | | SOU | 1868 | 1877 | Alabama Great Southern Railroad | |
| Alabama and Mississippi Railroad | A&M | | 1902 | 1921 | Mississippi and Alabama Railroad, Mississippi Export Railroad | |
| Alabama and Vicksburg Railway | A&V | IC | 1889 | 1959 | Illinois Central Railroad | |
| Arkansas City and Grenada Railroad | | C&G | 1872 | 1873 | Greenville, Columbus and Birmingham Railroad | |
| Avera and Northeastern Railroad | | | 1929 | 1933 | | |
| Batesville Southwestern Railroad | BSW | IC | 1910 | 1930 | | |
| Bonhomie and Hattiesburg Southern Railroad | | | 1923 | 1972 | Illinois Central Gulf Railroad | |
| Boyle and Sunflower River Railroad | | IC | 1896 | 1900 | Yazoo and Mississippi Valley Railroad | |
| Brookhaven and Pearl River Railway | | IC | 1904 | 1911 | Mississippi Valley Company | |
| Burlington Northern Inc. | BN | | 1980 | 1981 | Burlington Northern Railroad | |
| Burlington Northern Railroad | BN | | 1981 | 1996 | Burlington Northern and Santa Fe Railway | |
| Canton, Aberdeen and Nashville Railroad | | IC | 1882 | 1953 | Illinois Central Railroad | |
| Canton and Carthage Railroad | C&CA | | 1927 | 1960 | N/A | |
| Canton and Jackson Railroad | | IC | 1841 | 1852 | New Orleans, Jackson and Great Northern Railroad | |
| Canton, Kosciusko, Aberdeen and Tuscumbia Railroad | | IC | 1852 | 1853 | New Orleans, Jackson and Great Northern Railroad | |
| Central Mississippi Railroad | | IC | 1877 | 1878 | Chicago, St. Louis and New Orleans Railroad | |
| Chicago, St. Louis and New Orleans Railroad | | IC | 1878 | 1951 | Illinois Central Railroad | |
| Chickawsaha and Jackson Railroad | | | 1892 | 1914 | Chicora and Northwestern Railway | |
| Chicora and Northwestern Railway | | | 1914 | 1931 | N/A | |
| Clinton and Vicksburg Railroad | | IC | 1831 | 1833 | Commercial and Railroad Bank of Vicksburg | |
| Columbia, Lumberton and Gulf Railroad | | IC | 1894 | 1900 | Gulf and Ship Island Railroad | |
| Columbia and Silver Creek Railroad | CLSL | | 1982 | 1988 | Gloster Southern Railroad | |
| Columbus, Fayette and Decatur Railroad | | C&G | 1881 | 1881 | Georgia Pacific Railway | |
| Columbus and Greenville Railroad | C&G | C&G, SOU | 1920 | 1923 | Columbus and Greenville Railway | |
| Columbus and Greenville Railway | C&G | C&G | 1923 | 1972 | Illinois Central Gulf Railroad | |
| Commercial and Railroad Bank of Vicksburg | | IC | 1833 | 1850 | Vicksburg and Jackson Railroad | |
| Corinth and Counce Railroad | CCR | | 1958 | 1991 | TennRail Corporation | |
| Cybur, Gulf and Northwestern Railroad | | | 1914 | 1918 | | |
| Pearl River Valley Railroad | PRV | | 1917 | 2007 | N/A | |
| DeKalb and Western Railroad | DK&W, DKW | | 1916 | 1949 | | |
| Delta Southern Railway | | C&G | 1904 | 1921 | Itta Bena and Belzoni Railroad | |
| East Tennessee, Virginia and Georgia Railroad | | SOU | 1881 | 1886 | East Tennessee, Virginia and Georgia Railway | |
| East Tennessee, Virginia and Georgia Railway | | SOU | 1886 | 1894 | Southern Railway | |
| Ellisville and Laurel Railroad | | GM&O | 1902 | 1902 | Mobile, Jackson and Kansas City Railroad | |
| Fernwood, Columbia and Gulf Railroad | | | 1920 | 1972 | Illinois Central Gulf Railroad | |
| Fernwood and Gulf Railroad | | | 1906 | 1920 | Fernwood, Columbia and Gulf Railroad | |
| Gainesville and Mississippi Railroad | | GM&O | 1852 | 1854 | Mississippi, Gainesville and Tuscaloosa Railroad | |
| Georgia Pacific Railway | | C&G, SOU | 1881 | 1894 | Southern Railway in Mississippi | |
| Grand Gulf and Port Gibson Railroad | | IC | 1852 | 1883 | New Orleans, Baton Rouge, Vicksburg and Memphis Railroad | |
| Greenville, Columbus and Birmingham Railroad | | C&G | 1873 | 1881 | Columbus, Fayette and Decatur Railroad | |
| Greenville, Deer Creek and Rolling Fork Railroad | | C&G | 1870 | 1880 | Greenville, Columbus and Birmingham Railroad | |
| Gulf and Chicago Railroad | | GM&O | 1889 | 1903 | Gulf and Chicago Railway | |
| Gulf and Chicago Railway | | GM&O | 1903 | 1909 | New Orleans, Mobile and Chicago Railroad | |
| Gulf and Mississippi Railroad | GMSR | | 1985 | 1988 | SouthRail Corporation | |
| Gulf, Mobile and Northern Railroad | GM&N | GM&O | 1915 | 1940 | Gulf, Mobile and Ohio Railroad | |
| Gulf, Mobile and Ohio Railroad | GM&O | GM&O | 1938 | 1972 | Illinois Central Gulf Railroad | |
| Gulf and Ship Island Railroad | G&SI | IC | 1850 | 1945 | Illinois Central Railroad | |
| Helm and Northwestern Railroad | | IC | 1904 | 1931 | N/A | |
| Hiwannee and Tombigbee Railroad | | | 1906 | 1912 | N/A | |
| Illinois Central Railroad | IC | IC | 1883 | 1972 | Illinois Central Gulf Railroad | |
| Illinois Central Gulf Railroad | ICG | | 1972 | 1988 | Illinois Central Railroad | |
| Itta Bena and Belzoni Railroad | | | 1923 | 1928 | N/A | |
| Jackson and Brandon Railroad and Bridge Company | | IC | 1841 | 1852 | Southern Railroad | |
| Jackson and Brandon Railroad and Bridge Company | | IC | 1836 | 1838 | Mississippi and Alabama Railroad | |
| Jackson and Eastern Railway | | GM&O | 1916 | 1929 | Gulf, Mobile and Northern Railroad | |
| Kansas City, Memphis and Birmingham Railroad | | SLSF | 1886 | 1928 | St. Louis – San Francisco Railway | |
| Kentwood and Eastern Railroad | | | | 1922 | N/A | |
| Kentwood and Eastern Railway | K&E | | 1906 | 1922 | N/A | |
| Kingston and Central Mississippi Railway | | GM&O | 1901 | 1902 | Mobile, Jackson and Kansas City Railroad | |
| Kosciusko and Southeastern Railroad | | | 1916 | 1931 | N/A | |
| Leland Southwestern Railroad | | IC | 1906 | 1916 | N/A | |
| Liberty–White Railroad | | | 1902 | 1921 | N/A | |
| Louisville and Nashville Railroad | L&N | L&N | 1880 | 1983 | Seaboard System Railroad | |
| Louisville, New Orleans and Texas Railway | | IC | 1884 | 1892 | Yazoo and Mississippi Valley Railroad | |
| Memphis, Birmingham and Atlantic Railroad | | SLSF | 1885 | 1887 | Kansas City, Memphis and Birmingham Railroad | |
| Memphis and Charleston Railroad | | SOU | 1850 | 1898 | Memphis and Charleston Railway | |
| Memphis and Charleston Railway | | SOU | 1898 | 2002 | Norfolk Southern Railway | |
| Memphis, Holly Springs and Mobile Railroad | | SLSF | 1859 | 1867 | Memphis, Holly Springs, Okolona and Selma Railroad | |
| Memphis, Holly Springs, Okolona and Selma Railroad | | SLSF | 1867 | 1870 | Selma, Marion and Memphis Railroad | |
| Memphis, Holly Springs and Selma Railroad | | SLSF | 1881 | 1881 | Memphis, Selma and Brunswick Railroad | |
| Memphis and New Orleans Railroad and Levee Company | | IC | 1882 | 1887 | Louisville, New Orleans and Texas Railway | |
| Memphis, Selma and Brunswick Railroad | | SLSF | 1881 | 1885 | Memphis, Birmingham and Atlantic Railroad | |
| Memphis and Vicksburg Railroad | | IC | 1870 | 1884 | Louisville, New Orleans and Texas Railway | |
| Meridian and Bigbee Railroad | MBRR, MB | | 1952 | 1997 | M&B Railroad | |
| Meridian and Bigbee River Railway | | | 1917 | 1952 | Meridian and Bigbee Railroad | |
| Meridian, Brookhaven and Natchez Railroad | | IC | 1891 | 1946 | Illinois Central Railroad | |
| Meridian, Brookhaven and Natchez Railroad | | IC | 1882 | 1888 | Illinois Central Railroad | |
| Meridian and Deep Water Railway | | | 1911 | | Meridian and Bigbee River Railway | |
| Meridian and Memphis Railway | M&M | GM&O | 1911 | 1929 | Gulf, Mobile and Northern Railroad | |
| Meridian Terminal Company | | GM&O/ IC/ SOU | 1904 | 1958 | New Orleans and Northeastern Railroad | |
| MidSouth Rail Corporation | MSRC | | 1986 | 1993 | Kansas City Southern Railway | |
| Minter City Southern and Western Railroad | | IC | 1904 | 1932 | N/A | |
| Mississippi and Alabama Railroad | | | 1922 | 1950 | N/A | |
| Mississippi and Alabama Railroad | | IC | 1905 | 1913 | Chicago, St. Louis and New Orleans Railroad | |
| Mississippi and Alabama Railroad | | IC | 1836 | 1841 | Jackson and Brandon Railroad and Bridge Company | |
| Mississippi Central Railroad | MSC | IC | 1904 | 1967 | Illinois Central Railroad | |
| Mississippi Central Railroad | | IC | 1852 | 1874 | New Orleans, St. Louis and Chicago Railroad | |
| Mississippi Eastern Railway | ME | | 1903 | 1942 | N/A | |
| Mississippi, Gainesville and Tuscaloosa Railroad | | GM&O | 1854 | 1870 | Mobile and Ohio Railroad | |
| Mississippi and Schoona Valley Railroad | | | 1925 | 1926 | Mississippi and Skuna Valley Railroad | |
| Mississippi Southern Railroad | | | 1922 | 1932 | N/A | |
| Mississippi and Tennessee RailNet | MT | | 1998 | 2003 | Mississippi Tennessee Railroad | |
| Mississippi Tennessee Railroad | MTNR | | 2003 | 2011 | Ripley and New Albany Railroad | |
| Mississippi and Tennessee Railroad | | IC | 1852 | 1889 | Chicago, St. Louis and New Orleans Railroad | |
| Mississippi Valley Company | | IC | 1872 | 1945 | Illinois Central Railroad | |
| Mississippi Valley and Ship Island Railroad | | IC | 1873 | 1883 | New Orleans, Baton Rouge, Vicksburg and Memphis Railroad | |
| Mississippi and Western Railroad | | | 1917 | 1932 | N/A | |
| Missouri Pacific Railroad | MP | MP | 1965 | 1982 | Illinois Central Gulf Railroad | |
| Mobile, Hattiesburg and Jackson Railroad | | GM&O | 1888 | 1890 | Mobile, Jackson and Kansas City Railroad | |
| Mobile, Jackson and Kansas City Railroad | | GM&O | 1890 | 1909 | New Orleans, Mobile and Chicago Railroad | |
| Mobile and Northwestern Railroad | | IC | 1870 | 1889 | Louisville, New Orleans and Texas Railway, Mississippi Valley Company | |
| Mobile and Ohio Railroad | | GM&O | 1848 | 1940 | Gulf, Mobile and Ohio Railroad | |
| Moss Point and Pascagoula Railroad | | | 1894 | 1903 | Pascagoula Street Railway and Power Company | |
| Nashville and Mississippi Delta Railroad | | SOU | 1890 | 1902 | Southern Railway | |
| Natchez, Columbia and Mobile Railroad | | | 1892 | 1933 | N/A | |
| Natchez and Eastern Railway | | IC | 1906 | 1909 | Mississippi Central Railroad | |
| Natchez and Jackson Railroad | | IC | 1870 | 1872 | Natchez, Jackson and Columbus Railroad | |
| Natchez, Jackson and Columbus Railroad | | IC | 1872 | 1890 | Louisville, New Orleans and Texas Railway | |
| Natchez and Southern Railway | | MP | 1902 | 1965 | Missouri Pacific Railroad | |
| Natchez Trace Railroad | NTR | | 1982 | 1993 | Mississippi Central Railroad | |
| New Orleans, Baton Rouge, Vicksburg and Memphis Railroad | | IC | 1882 | 1884 | Louisville, New Orleans and Texas Railway | |
| New Orleans Great Northern Railroad | NOGN | GM&O | 1905 | 1933 | New Orleans Great Northern Railway | |
| New Orleans Great Northern Railway | | GM&O | 1933 | 1983 | Illinois Central Gulf Railroad | |
| New Orleans, Jackson and Great Northern Railroad | | IC | 1852 | 1874 | New Orleans, St. Louis and Chicago Railroad | |
| New Orleans, Jackson and Northern Railroad | | IC | 1877 | 1878 | Chicago, St. Louis and New Orleans Railroad | |
| New Orleans, Mobile and Chattanooga Railroad | | L&N | 1867 | 1871 | New Orleans, Mobile and Texas Railroad | |
| New Orleans, Mobile and Chicago Railroad | | GM&O | 1909 | 1915 | Gulf, Mobile and Northern Railroad | |
| New Orleans, Mobile and Texas Railroad | | L&N | 1871 | 1881 | Louisville and Nashville Railroad | |
| New Orleans and Northeastern Railroad | N&NE | SOU | 1871 | 1969 | Alabama Great Southern Railroad | |
| New Orleans and Northwestern Railway | | MP | 1884 | 1902 | Natchez and Southern Railway | |
| New Orleans, St. Louis and Chicago Railroad | | IC | 1874 | 1877 | Central Mississippi Railroad, New Orleans, Jackson and Northern Railroad | |
| North East and South West Alabama Railroad | | SOU | 1854 | 1868 | Alabama and Chattanooga Railroad | |
| Oak Grove and Georgetown Railroad | | | 1904 | 1927 | N/A | |
| Okolona, Houston & Calhoun City Railway | O.H.&C.C. | | 1933 | 1939 | N/A | |
| Pascagoula – Moss Point Northern Railroad | | | 1912 | 1915 | Alabama and Mississippi Railroad | |
| Pascagoula Northern Railroad | | | 1909 | 1912 | Pascagoula – Moss Point Northern Railroad | |
| Pearl and Leaf Rivers Railroad | | IC | 1897 | 1904 | Mississippi Central Railroad | |
| Richmond and Danville Railroad | | C&G, SOU | 1889 | 1894 | Southern Railway | |
| Ripley Railroad | | GM&O | 1871 | 1872 | Ship Island, Ripley and Kentucky Railroad | |
| Rosedale and Mississippi Central Railroad | | IC | 1890 | 1898 | Yazoo and Mississippi Valley Railroad | |
| St. Louis – San Francisco Railway | SLSF | SLSF | 1916 | 1980 | Burlington Northern Inc. | |
| St. Louis and San Francisco Railroad | | SLSF | 1903 | 1916 | St. Louis – San Francisco Railway | |
| Sanoody Valley Railroad | | | 1908 | 1915 | DeKalb and Western Railroad | |
| Sardis and Delta Railroad | | | 1900 | 1929 | N/A | |
| Seaboard System Railroad | SBD | | 1983 | 1986 | CSX Transportation | |
| Selma, Marion and Memphis Railroad | | SLSF | 1870 | 1881 | Memphis, Holly Springs and Selma Railroad | |
| Ship Island, Ripley and Kentucky Railroad | | GM&O | 1872 | 1889 | Gulf and Chicago Railroad | |
| Shubuta and Southwestern Railroad | | | 1905 | 1922 | N/A | |
| Southern Railroad | | IC | 1846 | 1867 | Vicksburg and Meridian Railroad | |
| Southern Railway | SOU | SOU | 1894 | 1990 | Norfolk Southern Railway | |
| Southern Railway in Mississippi | | C&G, SOU | 1894 | 1920 | Columbus and Greenville Railroad | |
| SouthRail Corporation | SR | | 1988 | 1993 | Kansas City Southern Railway | |
| Sunflower and Eastern Railway | | IC | 1901 | 1930 | N/A | |
| Tallahatta Railroad | | | 1902 | 1919 | N/A | |
| TennRail Corporation | | | 1991 | 1993 | Kansas City Southern Railway | |
| Vicksburg and Jackson Railroad | | IC | 1850 | 1857 | Southern Railroad | |
| Vicksburg and Meridian Railroad | | IC | 1867 | 1889 | Alabama and Vicksburg Railway | |
| Vicksburg, Pensacola and Ship Island Railroad | | IC | 1871 | 1873 | Mississippi Valley and Ship Island Railroad | |
| West and East Railroad | | IC | 1873 | 1886 | Yazoo and Mississippi Valley Railroad | |
| West Feliciana Railroad | | IC | 1831 | 1888 | Louisville, New Orleans and Texas Railway | |
| Yazoo Delta Railway | | IC | 1895 | 1900 | Yazoo and Mississippi Valley Railroad | |
| Yazoo and Mississippi Valley Railroad | | IC | 1882 | 1946 | Illinois Central Railroad | |
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