| Name | Mark | System[nb 1] | From | To | Successor | Notes |
| American Fork Railroad | | | 1872 | 1878 | N/A |
| Ballard and Thompson Railroad | | DRGW | 1911 | 1949 | N/A |
| Bingham Canon and Camp Floyd Railroad | | DRGW | 1872 | 1881 | Denver and Rio Grande Western Railway |
| Bingham Central Railway[1] | | Ohio Copper Company | 1907 | 1924 | Lost common carrier railroad status after 1924, continued as private mining railroad until Mascotte Tunnel closure. | Two foot gauge |
| Bingham and Garfield Railway | B&G, BG | | 1908 | 1948 | Kennecott Utah Copper |
| Cache Valley Railroad | | | 1918 | 1927 | N/A |
| California Short Line Railway | | DRGW | 1882 | 1889 | San Pete Valley Railway |
| Carbon County Railway | | DRGW | 1899 | 1900 | Rio Grande Western Railway |
| Carbon County Railway | CBC | | 1922 | 1982 | N/A |
| Castle Valley Railroad | | DRGW | 1909 | 1914 | Southern Utah Railroad |
| Castle Valley Railway | | DRGW | 1901 | 1908 | Denver and Rio Grande Railroad |
| Central Pacific Railroad | | SP | 1862 | 1899 | Central Pacific Railway |
| Central Pacific Railway | | SP | 1899 | 1959 | Southern Pacific Company |
| Coalville and Echo Railroad | | UP | 1869 | 1874 | Summit County Railroad |
| Copper Belt Railroad | | DRGW | 1901 | 1908 | Denver and Rio Grande Railroad |
| Deep Creek Railroad | | WP | 1916 | 1939 | N/A |
| Denver and Rio Grande Railroad | D&RG | DRGW | 1908 | 1921 | Denver and Rio Grande Western Railroad |
| Denver and Rio Grande Western Railroad | D&RGW, DRGW | DRGW | 1920 | 1997 | Union Pacific Railroad |
| Denver and Rio Grande Western Railway | | DRGW | 1881 | 1889 | Rio Grande Western Railway |
| Echo and Park City Railway | | UP | 1881 | 1899 | Union Pacific Railroad |
| Eureka Hill Railway | | | 1907 | 1928 | N/A |
| Goshen Valley Railroad | | DRGW | 1918 | 1947 | Denver and Rio Grande Western Railroad |
| Grass Creek Terminal Railway | | UP | 1894 | 1910 | N/A |
| Helper Western Railway | | | 1909 | 1920 | National Coal Railway |
| Inland Railway | | | 1916 | 1924 | N/A |
| Kenilworth and Helper Railroad | | DRGW | 1911 | 1926 | N/A |
| Little Cottonwood Transportation Company | | | 1916 | 1925 | N/A |
| Los Angeles and Salt Lake Railroad | SLR | UP | 1916 | 1987 | Union Pacific Railroad |
| Malad Valley Railroad | | UP | 1902 | 1910 | Oregon Short Line Railroad |
| National Coal Railway | | | 1920 | 1954 | N/A |
| New East Tintic Railway | | UP | 1896 | 1903 | San Pedro, Los Angeles and Salt Lake Railroad |
| Newhouse, Copper Gulch and Sevier Lake Railroad | | | 1904 | 1927 | N/A |
| Ogden and Syracuse Railway | | UP | 1887 | 1889 | Oregon Short Line and Utah Northern Railway |
| Ogden Union Railway and Depot Company | OURD | DRGW/ SP/ UP | 1888 | | | Still exists as a nonoperating subsidiary of the Union Pacific Railroad |
| Oregon Short Line Railroad | | UP | 1897 | 1987 | Union Pacific Railroad |
| Oregon Short Line Railway | | UP | 1882 | 1889 | Oregon Short Line and Utah Northern Railway |
| Oregon Short Line and Utah Northern Railway | | UP | 1889 | 1897 | Oregon Short Line Railroad |
| Rio Grande Western Railway | | DRGW | 1889 | 1908 | Denver and Rio Grande Railroad |
| St. John and Ophir Railroad | | | 1912 | 1928 | N/A |
| Salt Lake and Alta Railroad | | | 1913 | 1917 | N/A |
| Salt Lake City Union Depot and Railroad Company | | DRGW/ WP | 1907 | 1978 | N/A |
| Salt Lake and Eastern Railway | | DRGW | 1888 | 1897 | Utah Central Railroad |
| Salt Lake and Fort Douglas Railway | | DRGW | 1883 | 1897 | Utah Central Railroad |
| Salt Lake and Los Angeles Railway | SL&L | | 1892 | 1916 | Salt Lake, Garfield and Western Railway |
| Salt Lake and Mercur Railroad | | | 1894 | 1913 | N/A |
| Salt Lake and Park City Railway | | DRGW | 1881 | 1881 | Denver and Rio Grande Western Railway |
| Salt Lake, Sevier Valley and Pioche Railroad | | UP | 1872 | 1874 | Utah Western Railway |
| Salt Lake and Western Railway | | UP | 1881 | 1889 | Oregon Short Line and Utah Northern Railway |
| Saltair Railway | | | 1891 | 1892 | Salt Lake and Los Angeles Railway |
| San Pedro, Los Angeles and Salt Lake Railroad | | UP | 1901 | 1916 | Los Angeles and Salt Lake Railroad |
| San Pete Valley Railway | | DRGW | 1874 | 1908 | Denver and Rio Grande Railroad |
| Sevier Railway | | DRGW | 1891 | 1908 | Denver and Rio Grande Railroad |
| Sevier Valley Railway | | DRGW | 1880 | 1881 | Denver and Rio Grande Western Railway |
| Southern Pacific Company | SP | SP | 1885 | 1969 | Southern Pacific Transportation Company |
| Southern Pacific Transportation Company | SP | SP | 1969 | 1998 | Union Pacific Railroad |
| Southern Utah Railroad | | DRGW | 1907 | 1917 | N/A |
| Summit County Railroad | | UP | 1871 | 1880 | Echo and Park City Railway |
| Tintic Range Railway | | DRGW | 1891 | 1908 | Denver and Rio Grande Railroad |
| Tooele Valley Railway | TOV | | 1908 | 1981 | N/A |
| Uintah Railway | | | 1903 | 1939 | N/A |
| Union Pacific Railroad | | UP | 1862 | 1880 | Union Pacific Railway |
| Union Pacific Railway | | UP | 1880 | 1898 | Union Pacific Railroad |
| Utah Central Railroad | | DRGW | 1897 | 1908 | Denver and Rio Grande Railroad |
| Utah Central Railroad | | UP | 1869 | 1881 | Utah Central Railway |
| Utah Central Railway | | DRGW | 1890 | 1897 | Utah Central Railroad |
| Utah Central Railway | | UP | 1881 | 1889 | Oregon Short Line and Utah Northern Railway |
| Utah Coal Railway | | | 1912 | 1912 | Utah Railway |
| Utah Eastern Railroad | | UP | 1879 | 1887 | Echo and Park City Railway |
| Utah Eastern Railway | | DRGW | 1897 | 1900 | Rio Grande Western Railway |
| Utah and Nevada Railway | | UP | 1881 | 1889 | Oregon Short Line and Utah Northern Railway |
| Utah Northern Railroad | | UP | 1872 | 1878 | Utah and Northern Railway |
| Utah and Northern Railway | | UP | 1878 | 1889 | Oregon Short Line and Utah Northern Railway |
| Utah and Pacific Railroad | | UP | 1898 | 1903 | San Pedro, Los Angeles and Salt Lake Railroad |
| Utah and Pleasant Valley Railway | | DRGW | 1875 | 1882 | Denver and Rio Grande Western Railway |
| Utah Southern Railroad | | UP | 1871 | 1881 | Utah Central Railway |
| Utah Southern Railroad Extension Company | | UP | 1874 | 1881 | Utah Central Railway |
| Utah Terminal Railway | | | 1920 | 1921 | Utah Railway |
| Utah Western Railway | | DRGW | 1889 | 1890 | Utah Central Railway |
| Utah Western Railway | | UP | 1874 | 1880 | Utah and Nevada Railway |
| Wasatch and Jordan Valley Railroad | | DRGW | 1872 | 1881 | Denver and Rio Grande Western Railway |
| Western Pacific Railroad | WP | WP | 1916 | 1987 | Union Pacific Railroad |
| Western Pacific Railway | | WP | 1903 | 1916 | Western Pacific Railroad |