M Train

M Train or M-Train may refer to:
 * M>Train, a former operator of half of Melbourne's suburban railway network and a former Melbourne tram service (2001–2004)
 * M (New York City Subway service)
 * MTR M-Train EMU or MTR Metro Cammell EMU, metro rolling stock of Hong Kong
 * Train M, a former service of Helsinki commuter rail
 * M Train (book), a 2015 book by Patti Smith
 * The MTrain Tour, Meghan Trainor's second tour