D series

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)

Other

 * Tool steel D series, high carbon-chromium