D Train or D-Train may refer to:
Entertainment The D Train, a 2015 American film D Train (music group),1980–1985 R&B duo D. Train (album), 1982 James D-Train Williams (born 1962), American singer
Transportation Europe D Train (Paris), a train on the D Line, one of the RER five lines serving Paris and its suburbs D-Zug, a type of express train service in Germany, Austria, and Switzerland
United States D (New York City Subway service), New York City Green Line D branch, Greater Boston D Line (Los Angeles Metro), a rapid transit line in Los Angeles County, California
Others Vivarail D-Train, a family of multiple unit trains built by Vivarail for the British rail network
Other uses Dontrelle Willis or "The D-Train" (born 1982), American baseball player
See also 4D (train), a prototype double deck electric train, Victoria, Australia D Line (disambiguation) D Stock, London Underground