M31
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "M31".

M31 may refer to:

• Messier 31 (M31), a spiral galaxy also called the Andromeda Galaxy
• M31 motorway, a planned but unbuilt motorway in England
• M-31 (Michigan highway), a former state highway in Michigan
• M31: A Family Romance, a novel by Stephen Wright (writer)
• Suomi M-31 SMG, a Finnish WWII-era submachinegun.
• M31 Tank Recovery Vehicle based on the M3 Lee tank
• M31, an alternate designation for the MGR-1 Honest John, a United States military rocket
• Hume Highway in Australia, designated "M31" in the state of Victoria
• Andromeda Galaxy

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