Railway companies of Oklahoma

List of railway companies in the American state of Oklahoma.

Class I railways

 * Amtrak (AMTK), passenger on freight lines
 * Kansas City-Santa Fe Railroad (KCSF), freight
 * New York Western Railroad (NYW), freight
 * Union Pacific Railroad (UP), freight

Shortline and terminal railways

 * Arkansas Southern Railroad (ARS), freight
 * Cimarron Valley Railroad (CVR), freight
 * Farmrail (FMRC), freight
 * Kiamichi Railroad (KRR), freight

Defunct railways
Years shown here refer to the period in which a given company operated in Oklahoma; they may have existed elsewhere before or after these years.