- September 20
- 1820 – Alfred Belpaire (pictured), inventor of the Belpaire firebox used on steam locomotives, is born (d. 1893).
- 1853 – Indianapolis's Union Station, the first union station in the United States, opens.
- 1873 – In order to contain the Panic of 1873, brought on by the failure of Jay Cooke & Company in financing the Northern Pacific Railway, the New York Stock Exchange halts all trading and closes for ten days.
- 1997 – RaiLink Southern Ontario begins operations on the former Canadian National Railway Hagersville subdivision between Nanticoke and Brantford.
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