1973

Timelines:	1970 1971 1972 1973 1974 1975 1976
Births:	1970 1971 1972 1973 1974 1975 1976
Deaths:	1970 1971 1972 1973 1974 1975 1976
Establishments:	1970 1971 1972 1973 1974 1975 1976
Disestablishments:	1970 1971 1972 1973 1974 1975 1976
Introductions:	1970 1971 1972 1973 1974 1975 1976
Accidents:	1970 1971 1972 1973 1974 1975 1976
Images:	1970 1971 1972 1973 1974 1975 1976

By month

January

• January 27 – The State of Massachusetts purchases the Attleboro/Stoughton Line in Massachusetts for the Massachusetts Bay Transportation Authority.
• January 28 – Amtrak introduces the Inter-American passenger train connecting Chicago to Laredo, Texas, via St. Louis, Missouri, Little Rock, Arkansas, and Dallas, Texas.

March

• March 2 – The Copper Range Railroad in Michigan abandons all rail operations.
• March 13 – Michigan governor William Milliken issues an executive order placing state railroad regulation under a newly reorganized Michigan Department of Transportation.