All North American Railroads

The Union Pacific Railroad Company (reporting marks UP, UPP, UPY) is a Class I freight-hauling railroad that operates 8,300 locomotives over 32,200 miles (51,800 km) routes in 23 U.S.

The National Railroad Passenger Corporation, doing business as Amtrak (; reporting marks AMTK, AMTZ), is the national passenger railroad company of the United States.

The Norfolk and Western Railway (reporting mark NW), commonly called the N&W, was a US class I railroad, formed by more than 200 railroad mergers between 1838 and 1982.

The Wisconsin and Southern Railroad (reporting mark WSOR) is a Class II regional railroad in Southern Wisconsin and Northeastern Illinois currently operated by Watco.

The Ferrocarril del Sureste (reporting mark FSRR) (English: "Southeastern Railway"), commonly known by the syllabic abbreviation Ferrosur, is a railway that serves the southeastern regions of Mexico.

The Fitchburg Railroad is a former railroad company, which built a railroad line across northern Massachusetts, United States, leading to and through the Hoosac Tunnel.

The Utah Railway (reporting mark UTAH) is a class III railroad operating in Utah and Colorado, and owned by Genesee & Wyoming Inc.

The Port of Tillamook Bay Railroad (reporting mark POTB) is a shortline railroad in northwestern Oregon in the United States.

The Cartier Railway (reporting marks AMMC, AMIC, AMC) (formerly CFC and QCM) is a privately owned railway that operates 260 miles (418 km) of track in the Canadian province of Québec.

The Montour Railroad (reporting mark MTR) was a short line railroad company operating passenger and freight service in southwestern Pennsylvania.

The Cincinnati, Hamilton and Dayton Railway (CH&D) was a railroad based in the U.S.

The New Brunswick East Coast Railway (reporting mark NBEC) was a railway that operated in the Canadian province of New Brunswick.

Genesee & Wyoming Inc. (G&W) is an American short line railroad holding company, that owns or maintains an interest in 122 railroads and railways in the United States, Canada, Belgium, the Netherlands, Poland, Bolivia and the United Kingdom; and formerly in Australia.

and is often classed with North American Class I railroads.

The Pennsylvania Railroad (reporting mark PRR), officially the Pennsylvania Railroad Company, also known as the "Pennsy," was an American Class I railroad established in 1846 and headquartered in Philadelphia.

The Canadian National Railway Company (French: Compagnie des chemins de fer nationaux du Canada) (reporting mark CN) is a Canadian Class I freight railway headquartered in Montreal, Quebec, which serves Canada and the Midwestern and Southern United States.

The Maine Central Railroad (reporting mark MEC) was a U. S. class 1 railroad in central and southern Maine.

of trackage in the states of New Jersey, New York, and Pennsylvania.

The Connecticut Company was the primary electric street railway company in the U.S.

The Atlantic and Great Western Railroad began as three separate railroads: the Erie and New York City Railroad based in Jamestown, New York; the Meadville Railroad based in Meadville, Pennsylvania (renamed A&GW in April 1858); and the Franklin and Warren Railroad based in Franklin Mills, Ohio (renamed A&GW in January 1853).

was an American railway company that operated from 1856