M311 or M-311 may refer to:
*
M-311 (Michigan highway)
*
Alenia Aermacchi M-311, a turbofan-powered military trainer
*
EML Wambola (M311)
EML ''Wambola'' (M311) is a ''Lindau''-class minehunter of the Estonian Navy Mineships Division, formerly the German warship ''Cuxhaven''. The commanding officer of the vessel is Captain Jaanus Antson.
The minehunter ''Wambola'' is the first ...
, a Lindau-class minehunter of the Estonian Navy
* The CQ M-311, a variant of the
Norinco CQ rifle
* The M-311 compass invented by
Tuomas Vohlonen
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