1939 in rail transport

Events

January 15 – Interurban trains begin service across the San Francisco–Oakland Bay Bridge and half of all San Francisco Municipal Railway streetcars are routed to the Transbay Terminal to allow for connections.
January – Electro-Motive Corporation introduces the SW1.

March 8 – Edward Engel succeeds Samuel T. Bledsoe as president of Atchison, Topeka and Santa Fe Railway following Bledsoe's death.
March – Electro-Motive Corporation introduces the EMC E3.

right|200px|thumb|First [[GSR Class 800, No. 800 Maedhbh, Ireland's most powerful locomotive]]

April – Great Southern Railways in the Republic of Ireland introduce first Class 800 4-6-0, the largest and most powerful steam locomotives ever to run in Ireland.
April 22 – The IND World's Fair Line of the New York City Subway opens for the first of two seasons serving the 1939 New York World's Fair, where a British LMS Coronation Class steam locomotive is among the displays.
April 27 – Cecil B. DeMille’s movie Union Pacific, the story of the building of the transcontinental railroad, premieres in Union Pacific's home town of Omaha, Nebraska. During its production the studio used so many trains that a railroad operating permit was required from the Interstate Commerce Commission. After the premiere, a 15-car train of period equipment tours the country promoting the movie.
April 30 – The first passenger train to be equipped with fluorescent lighting throughout, the General Pershing Zephyr of the Chicago, Burlington and Quincy Railroad, is placed in scheduled service between St. Louis and Kansas City.

May – Union Pacific, Southern Pacific and Santa Fe passenger trains in Los Angeles, California, are united into a single terminal as Los Angeles Union Passenger Terminal is opened.
May 17 – George VI and Queen Elizabeth arrive at Wolfe's Cove, Quebec, to begin a tour of Canada; the tour train is pulled by Canadian Pacific Railway 4-6-4 locomotives 2850 and 2851, earning the class the name Royal Hudson.
May 23 – Harvey C. Couch succeeds Charles E. Johnston as president of Kansas City Southern Railway.

June 1 – Mount McKinley Hotel opens, bringing tourists via the Alaska Railroad to the Denali area.
June – Union Pacific Railroad retires the M-10001 streamliner trainset from City of Portland service, replacing it with the M-10002 trainset from the City of Los Angeles service.

July 16 – The world's first diesel-powered rack locomotive enters service on the Manitou and Pike's Peak Railway.

August 11 – C. P. Couch succeeds his brother Harvey C. Couch as president of Kansas City Southern Railway.
August 12 – City of San Francisco derailment on the Southern Pacific Railroad near Harney, Nevada, due to sabotage whose perpetrator is never discovered.

September 1
British Government takes control of railways as a wartime measure; start of a 4-day evacuation of children by rail from major cities (over 600,000 from London).
The Østfold Line in Norway takes electric traction into use between Kornsjø and the Swedish border.
September 10 – The Østfold Line in Norway takes electric traction into use between Halden and Kornsjø.