Class I Railroad map of North America.

Click to enlarge.

(Kmusser, CC BY-SA 2.5 <https://creativecommons.org/licenses/by-sa/2.5>, via Wikimedia Commons)

RAILROADS A-Z

CLASS I AND FORMER CLASS I RAILROADS

Class I railroads are the largest rail carriers in the United States. In 1900, there were 132 Class I railroads, but as the result of mergers and bankruptcies, the industry has consolidated and in August of 2021, just seven Class I freight railroads remained. Now there are only six.

Note: This list also includes other important Class II or noteworthy roads and transit systems.

See also: Railroad Classes