List of Connecticut railroads

This is a list of railroad companies which currently or formerly operated at least partially in the U.S. state of Connecticut.

Active railroads

Name	Mark	Image	Founded	Predecessor	Description	Owner	References
Amtrak	AMTK		1971	Penn Central Transportation Company	National intercity passenger railroad of the United States. Operates on the Northeast Corridor, owns and operates the New Haven–Springfield Line.	Federal government of the United States
CT Rail	CNDX		1990	N/A	Brand for commuter rail services operated by the State of Connecticut. Includes the Hartford Line, run under contract by TransitAmerica Services and Alternate Concepts, and Shore Line East, run under contract by Amtrak.	Connecticut Department of Transportation
Metro-North Railroad	MNCW		1983	Conrail	Operates commuter service along the New Haven Line, New Canaan Branch, Danbury Branch, and Waterbury Branch, under contract with the state of Connecticut.	Metropolitan Transportation Authority

Entries in this list were interurbans, streetcars, or other electric railroads dedicated to passenger transport.

Name	Founded	Disestablished	Successor	Description	References
Branford Lighting and Water Company		1905	Consolidated Railway
Bridgeport Horse Railway Company
Bridgeport Railway Company
Bridgeport Traction Company
Bristol Traction Company
Central Railway and Electric Company
Cheshire Street Railway
Connecticut Company
Connecticut Railway and Lighting Company
Consolidated Railway
Danbury and Bethel Street Railway
Fair Haven and Westville Railroad
Farmington Street Railway
Hartford and Springfield Street Railway
Hartford, Manchester and Rockville Tramway Company
Hartford Street Railway
Hartford and West Hartford Horse Railroad
Meriden Electric Railroad
Meriden, Southington and Compounce Tramway Company
Middletown Street Railroad
Montville Street Railway
New Haven Street Railway
New London Street Railway
Norwich Street Railway
People's Tramway
Shore Line Electric Railway
Stamford Street Railroad
Stafford Springs Street Railway
Torrington and Winchester Street Railway
Waterbury and Milldale Tramway	June 5, 1907	April 3, 1936	Replaced by bus line
West Shore Railway
Winchester Avenue Railroad

;Not completed