The following railroads operate in the U.S. state of Washington.
Common freight carriers Ballard Terminal Railroad (BDTL) BNSF Railway (BNSF) Cascade & Columbia River Railroad (CSCD) (GWRR) Central Washington Railroad (CWRR) (CBRW) Columbia Basin Railroad (CBRW) Columbia and Cowlitz Railway (CLC) (PATR) Columbia Walla Walla Railroad (CWW) (FTRX) Eastside Freight Railroad (EFRX) (BDTL) Frontier Rail (FTRX) Great Northwest Railroad (GRNW) (WATX) Kennewick Terminal Railroad (KET) (FTRX) Kettle Falls International Railway (KFR) Meeker Southern Railroad (MSN) (BDTL) Mount Vernon Terminal Railway (MVT) Olympia and Belmore Railroad (OYLO) (GWRR) Palouse River and Coulee City Railroad (PCC) (WATX) Patriot Woods Railroad (PAWR) (PATR) Pend Oreille Valley Railroad (POVA) Portland Vancouver Junction Railroad (PVJR) operates Lewis and Clark Railway (LINC) Puget Sound and Pacific Railroad (PSAP) (GWRR) Rainier Rail (RANR) (FTRX) St. Paul & Pacific Northwest Railroad (STPP) Spokane, Spangle & Palouse Railway (SS&P) Tacoma Rail (TMBL, TRMW) Union Pacific Railroad (UP) Washington Eastern Railroad (WER) Washington Royal Line (WRL) (FTRX)
Private freight carriers Greenbrier Rail Services Longview Switching Company United States Army (USAX)
Passenger carriers
Amtrak (AMTK) Chehalis–Centralia Railroad Chelatchie Prairie Railroad Lake Whatcom Railway Mt. Rainier Scenic Railroad Seattle Streetcar Snoqualmie Valley Railroad Sound Transit (Sounder, Tacoma Link, and Central Link) Yakima Electric Railway Museum
Defunct railroads