Union Pacific Railroad

Class I freight-hauling railroad in the United States

Union Pacific Railroad (or legally Union Pacific Railroad Company and simply Union Pacific) is a freight-hauling railroad that has 8,500 locomotives. They have over 32,100 route-miles in 23 U.S. states west of Chicago and New Orleans. The Union Pacific Railroad system is the biggest in the United States. They are one of the world's biggest transportation companies.[1]

Union Pacific Railroad
System map (trackage rights in purple)
General Electric ET44AH locomotive photographed in June 2016
Headquarters1400 Douglas Street
Omaha, Nebraska, U.S.
Reporting markUP (road locomotives), UPY (yard locomotives), UPP (passenger railcars)
LocaleUnited States from Chicago, Illinois, and cities along the Mississippi River to the Pacific coast
Dates of operation1862–present (legacy)
  • First (original) company, Union Pacific Rail Road: 1862–1880
  • Second company, Union Pacific Railway: 1880–1897
  • Third company, Union Pacific Railroad (Mark I): 1897–1998
  • Fourth company, Union Pacific Railroad (Mark II): 1969–present (originally Southern Pacific Transportation Company until 1998; renamed Union Pacific during UP-SP merger)
Track gauge4 ft 8 12 in (1,435 mm)
Length32,100 miles (51,660 km)


  1. "Company Overview". Union Pacific Corporation. 31 December 2013. Retrieved 27 March 2014.

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