D series may refer to:
Devices
SM-65D Atlas "Atlas D" ICBM
Nikon digital single lens reflex cameras
Media
QI (D series), the fourth series of the BBC TV quiz show QI
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 Harvester light & medium duty trucks of the D Series - 1930s and International Harvester Light Line pickup, 1969–1975 MCI D-Series motorcoaches built by Motor Coach Industries (MCI) SJ D, locomotives used by Statens Järnvägar (SJ) of Sweden Volkswagen Group D platform, Audi, Bentley, and Volkswagen chassis configuration D-series trains, the designation for high-speed long-distance trains in China less fast than the G-series (see Passenger rail transport in China#Classes)
Other
Tool steel D series, high carbon-chromium
See also
C series (disambiguation) E series (disambiguation)