M class

M class or M-class may refer to:

Military

M-class blimp, an American WW2 class of anti-submarine warfare airships
M-class cruiser, a planned German light cruiser class
M-class destroyer, several classes of destroyer
- Admiralty M-class destroyer, a class of British destroyers built 1913–1916 and served in World War I
- M-class, British destroyers starting with the letter M of the L and M-class destroyer, launched 1939–1942 and served in World War II
- Marcílio Dias-class destroyer, Brazilian destroyers built during World War II
Karel Doorman-class frigate, of the Royal Netherlands Navy
M-class minesweeper, several classes of minesweeper
- M-class minesweeper (Germany), a class of minesweepers of the World War II German Kriegsmarine
- M-class minesweeper (Netherlands), a class of minesweepers of the Royal Netherlands Navy built after World War I
Abercrombie-class monitor, a British WWI class of monitor gunships
M-class submarine, several classes of submarine
- British M-class submarine
- United States M-class submarine

Mercedes-Benz M-Class, an automobile
M-segment, a European vehicle size class
NBR M Class 4-4-0, steam locomotives
NZR M class locomotives
Pennsylvania Railroad class M1, locomotives
South Australian Railways M class (first), 0-4-2 steam locomotives
South Australian Railways M class (second), 2-4-2T steam locomotives
Tasmanian Government Railways M class (1912), 4-4-2+2-4-4 steam locomotives
Tasmanian Government Railways M class (1952), 4-6-2 steam locomotives
Victorian Railways M class, steam locomotives
Victorian Railways M class (diesel-hydraulic), shunting locomotives
WAGR M class, 2-6-0+0-6-2 steam locomotives
WAGR M class (1875), 2-6-0 steam locomotives
WAGR M class (diesel), diesel-hydraulic locomotives
OOCL M-class container ship, a class of large container ships operated by Orient Overseas Container Line
Maersk M-class container ship, a class of large container ships operated by Maersk Line
M-class Melbourne tram
M-class Sydney tram