The following railroads operate in the U.S. state of Arkansas.
Class I railroads BNSF Railway (BNSF) Canadian Pacific Kansas City (CPKC) Union Pacific Railroad (UP)
Regional railroads Missouri and Northern Arkansas Railroad (MNA)
Shortline and terminal railroads Arkansas, Louisiana and Mississippi Railroad (ALM) Arkansas Midland Railroad (AKMD) Arkansas and Missouri Railroad (AM) Arkansas Southern Railroad (ARS) Camden and Southern Railroad (CSR) Dardanelle and Russellville Railroad (DR) Delta Valley and Southern Railway (DVS) De Queen and Eastern Railroad (DQE) East Camden and Highland Railroad (EACH) El Dorado and Wesson Railway (EDW) Fordyce and Princeton Railroad (FP) Fort Smith Railroad (FSR) Kiamichi Railroad (KRR) Little Rock Port Authority Railroad (LRPA) Little Rock and Western Railway (LRWN) Louisiana and North West Railroad (LNW) North Louisiana and Arkansas Railroad (NLA) Ouachita Railroad (OUCH) Prescott and Northwestern Railroad (PNW) Warren and Saline River Railroad (WSR) West Memphis Base Railroad (WMBR)
Passenger railroads
Amtrak (AMTK): Texas Eagle Metro Streetcar
Heritage and scenic railroads Northwestern Arkansas A&M Excursion Eureka Springs and North Arkansas Railway Fort Smith Trolley Museum
Industrial rail operations Bauxite and Northern Railway (BXN) Granite Mountain Quarries Railroad (GMQX)
Defunct railroads