Railway companies of New Brunswick

List of railway companies in the Canadian province of New Brunswick.

Companies based in Canada

 * Canadian National Railway (CN), freight
 * Canadian Pacific Railway (CP), freight
 * VIA Rail (VIA), passenger on CN and CP lines

Companies based outside of Canada

 * Conrail (CR), United States, freight and passenger

Regional railways

 * New Brunswick Southern Railway (NBSR)

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