The following railroads operate or once operated in the District of Columbia.
Current railroads
Freight
CSX Transportation (CSXT)
Passenger
Amtrak (AMTK)
Commuter
MARC Train (MARC) Virginia Railway Express (VREX) Washington Metro
Defunct railroads
Electric
Alexandria, Barcroft and Washington Transit Company
Anacostia and Potomac River Railroad
Baltimore and Ocean City Railway
Baltimore and Washington Transit Company
Brightwood Railway
Capital Traction Company
Capital Transit Company
Capitol, North O Street and South Washington Railway
City and Suburban Railway
Columbia Railway
Georgetown and Tennallytown Railway
Great Falls and Old Dominion Railroad
Metropolitan Railroad
Rock Creek Railway
Tennallytown and Rockville Railroad
Washington and Georgetown Railroad
Washington and Glen Echo Railroad
Washington and Great Falls Electric Railway
Washington and Old Dominion Railway
Washington and Rockville Railway
Washington, Baltimore and Annapolis Electric Railroad
Washington, Baltimore and Annapolis Electric Railway
Washington, Berwyn and Laurel Electric Railway
Washington Interurban Railway
Washington Railway and Electric Company
Washington, Spa Springs and Gretta Railroad
Washington Traction and Electric Company
Washington–Virginia Railway
Washington, Woodside and Forest Glen Railway and Power Company
Notes
Further reading
Timeline of Washington, D.C. Railroad History
References
Federal and Local Legislation Relating to Canals and Steam Railroads in the District of Columbia, 1802-1903
Railroads
Washington D.C.