- June 20
- 1862 – The bill that would become the Pacific Railroad Act authorizing the construction of the First Transcontinental Railroad is passed by the United States Senate.
- 1874 – The Denver, South Park and Pacific Railroad (pictured), building from Denver, reaches Morrison, Colorado.
- 1937 – Pennsylvania Railroad's Manhattan Transfer station in New York City closes after 26 years of service in favor of Newark Penn Station.
- 1983 – The Chicago and North Western Railway wins a bidding war against the Soo Line for control of the former Chicago, Rock Island and Pacific Railroad "Spine Line"; the Interstate Commerce Commission awarded the line to CNW's $93 million bid.
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