This list of Colorado railroads identifies the variety of active, historic, and defunct railroads in the U.S. State of Colorado. __TOC__
Common freight carriers BNSF Railway Company (BNSF) Cimarron Valley Railroad L.C. (CVR) Colorado and Wyoming Railway Company (CW) Colorado Pacific Railroad LLC (CXR) Colorado Pacific Rio Grande Railroad LLC (CXRG) Colorado Pacific San Luis Railroad LLC (CXSL) The Denver Rock Island Railroad (DRIR) Great Western Railway of Colorado, L.L.C. (GWR) Hudson Terminal Rail Services, LLC (HTR) Kansas & Oklahoma Railroad, L.L.C. (KO) Keenesburg Direct Railroad (KDR) Kyle Railroad (KYLE) Nebraska, Kansas & Colorado Railway, LLC (NKCR) Rock & Rail LLC (RRRR) Union Pacific Railroad Company (UP) Utah Railway Company (UTAH)
Historic attraction carriers Cañon City & Royal Gorge Railroad, LLC (DBA Royal Gorge Route Railroad) Cripple Creek and Victor Narrow Gauge Railroad Cumbres and Toltec Scenic Railroad Durango & Silverton Narrow Gauge Railroad Company Fort Collins Municipal Railway Georgetown Loop Railroad Leadville, Colorado & Southern Railroad Co. Manitou and Pike's Peak Railway Company Platte Valley Trolley (Denver Tramway Heritage Society) Rio Grande Scenic Railroad
Private freight carriers Deseret Western Railway MillerCoors Brewery Rawhide Shortline
Passenger carriers
Amtrak (AMTK) RTD Rail Colorado San Francisco and Northern LLC. Canyon Spirit
Defunct railroads