| Name | Mark | System[nb 1] | From | To | Successor | Notes |
|---|
| Bad Water Line | BDW | | 1988 | 2000 | Bad Water Railway | |
| Bad Water Railway | BDW | | 2000 | 2002 | Bighorn Divide and Wyoming Railroad | |
| Big Horn Railroad | | CB&Q | 1905 | 1916 | Chicago, Burlington and Quincy Railroad | |
| Burlington Northern Inc. | BN | | 1970 | 1981 | Burlington Northern Railroad | |
| Burlington Northern Railroad | BN | | 1981 | 1996 | Burlington Northern and Santa Fe Railway | |
| Carbon Cut-Off Railway | | UP | 1889 | 1899 | Union Pacific Railroad | |
| Cheyenne and Burlington Railroad | | CB&Q | 1887 | 1908 | Chicago, Burlington and Quincy Railroad | |
| Cheyenne and Northern Railway | | UP | 1886 | 1890 | Union Pacific, Denver and Gulf Railway | |
| Chicago, Burlington and Quincy Railroad | CB&Q, CBQ | CB&Q | 1889 | 1970 | Burlington Northern Inc. | |
| Chicago, Burlington and Quincy Railway | | CB&Q | 1901 | 1907 | N/A | Leased theChicago, Burlington and Quincy Railroad |
| Chicago and North Western Railway | CNW | CNW | 1903 | 1972 | Chicago and North Western Transportation Company | |
| Chicago and North Western Transportation Company | CNW | CNW | 1972 | 1995 | Union Pacific Railroad | |
| Colorado Railroad | | CB&Q | 1909 | 1930 | Colorado and Southern Railway | |
| Colorado Central Railroad | | UP | 1877 | 1890 | Union Pacific, Denver and Gulf Railway | |
| Colorado and Southern Railway | C&S, CS | CB&Q | 1898 | 1981 | Burlington Northern Railroad | |
| Colorado and Wyoming Railway | CW | | 1899 | 1980 | N/A | |
| Colorado, Wyoming and Eastern Railway | | UP | 1914 | 1924 | Northern Colorado and Eastern Railroad | |
| Denver Pacific Railway and Telegraph Company | | UP | 1867 | 1880 | Union Pacific Railway | |
| Eastern Wyoming Railway | | CNW | 1890 | 1891 | Fremont, Elkhorn and Missouri Valley Railroad | |
| Fremont, Elkhorn and Missouri Valley Railroad | | CNW | 1891 | 1903 | Chicago and North Western Railway | |
| Grand Island and Northern Wyoming Railroad | | CB&Q | 1889 | 1897 | Chicago, Burlington and Quincy Railroad | |
| Laramie, Hahns Peak and Pacific Railway | | | 1901 | 1914 | Colorado, Wyoming and Eastern Railway | |
| Laramie, North Park and Pacific Railroad and Telegraph Company | | UP | 1880 | 1900 | Union Pacific Railroad | |
| Laramie, North Park and Western Railroad | | UP | 1924 | 1951 | Union Pacific Railroad | |
| Nebraska, Wyoming and Western Railroad | | CB&Q | 1899 | 1908 | Chicago, Burlington and Quincy Railroad | |
| North and South Railway | | | 1923 | 1935 | N/A | |
| Northern Colorado and Eastern Railroad | | UP | 1924 | 1924 | Laramie, North Park and Western Railroad | |
| Oregon Short Line Railroad | | UP | 1897 | 1987 | Union Pacific Railroad | |
| Oregon Short Line Railway | | UP | 1881 | 1889 | Oregon Short Line and Utah Northern Railway | |
| Oregon Short Line and Utah Northern Railway | | UP | 1889 | 1897 | Oregon Short Line Railroad | |
| Saratoga and Encampment Railway | | UP | 1905 | 1928 | Saratoga and Encampment Valley Railroad | |
| Saratoga and Encampment Valley Railroad | | UP | 1928 | 1951 | Union Pacific Railroad | |
| Union Pacific Railroad | | UP | 1862 | 1880 | Union Pacific Railway | |
| Union Pacific Railway | | UP | 1880 | 1898 | Union Pacific Railroad | |
| Union Pacific, Denver and Gulf Railway | | UP | 1890 | 1898 | Colorado and Southern Railway | |
| Wyoming Railway | WYO | | 1909 | 1953 | N/A | |
| Wyoming Central Railway | | CNW | 1885 | 1891 | Fremont, Elkhorn and Missouri Valley Railroad | |
| Wyoming Colorado Railroad | WYCO | | 1987 | 2007 | none | Line scrapped in 2007, the division in the state ofOregon is still in operation, however. |
| Wyoming and Missouri River Railroad | | | 1895 | 1924 | Wyoming and Missouri River Railway | |
| Wyoming and Missouri River Railway | | | 1924 | 1927 | N/A | |
| Wyoming North and South Railroad | | | 1923 | 1924 | North and South Railway | |
| Wyoming and Northwestern Railway | | CNW | 1904 | 1920 | Chicago and North Western Railway | |
| Wyoming State Railway | | CNW | 1904 | 1904 | Wyoming and Northwestern Railway | |
| Wyoming Western Railroad | | UP | 1900 | 1910 | Oregon Short Line Railroad | |
