M73 or M-73 may refer to:
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M73 machine gun, an American belt-fed machine gun
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M-73 (Michigan highway), a state highway in Michigan
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M73 motorway
The M73 is a motorway in Glasgow and North Lanarkshire, Scotland. It is long and connects the M74 motorway with the M80 motorway, providing an eastern bypass for Glasgow. The short stretch between junctions 1 and 2 is part of unsigned inte ...
, a motorway in Scotland
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BMW M73, a 1993 V12 piston engine
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Messier 73, a random grouping of stars in the constellation Aquarius
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