D series may refer to:
Technology Nikon D series, of digital cameras SM-65D Atlas or Atlas D, an ICBM Tool steel D series, high carbon-chromium tool steel
Vehicles Allis-Chalmers D Series, tractors Bedford D series, trucks Chevrolet Series D, trucks Dodge D series, pickup trucks Ford D series, trucks Group D Production Sports Cars, CAMS class of race car Honda D engine International D-Series, of pickup trucks MCI D-Series, motorcoaches built by Motor Coach Industries SJ D, locomotives used by Statens Järnvägar of Sweden Volkswagen Group D platform, Audi, Bentley, and Volkswagen chassis configuration D-series trains, a designation of trains in China; see Passenger rail transport in China#Classes
Other uses QI (D series), the fourth series of the BBC TV quiz show QI
See also D (disambiguation)