M20

M20 or M-20 may refer to:

In transportation:
* M-20 (Michigan highway), a state highway in Michigan
* M20 motorway, a motorway in England
* BMW M20, a 1976 automobile engine
* Mooney M20, a general aviation aircraft

In science and technology:
* Messier 20 (M20), a nebula also called the Trifid Nebula
* Olivetti M20, an Italian personal computer
* British NVC community M20, a mire biological community in the United Kingdom

In firearms and military equipment:
* M20 Armored Utility Car, a WWII-era American scout car
* M20 recoilless rifle, an American rifle
* M20 Super Bazooka, an American anti-tank rocket launcher
* M20 SLBM, a French nuclear missile
* Miles M.20, a Second World War fighter

In music:
* Matchbox Twenty, an American band