Several classes of destroyer have been known as "M". These include:

  • Admiralty M-class destroyer, a class of Royal Navy destroyers built 1913–1916 and that served in World War I
  • Hawthorn Leslie M-class destroyer, a variant of the above class
  • Thornycroft M-class destroyer, a variant of the Admiralty design
  • Yarrow M-class destroyer, a variant of the Admiralty design
  • L and M-class destroyer, a class of Royal Navy destroyers launched 1939–1942 and that served in World War II
  • Marcílio Dias-class destroyer, three ships of the Brazilian Navy that served in World War II

See also

  • M class (disambiguation)