D7, D07, D.VII, D VII, D.7 or D-7 may refer to:
Arts and entertainment D7, a chord (music) D7, a note in the whistle register D-7, a song by the Wipers from the 1980 album Is This Real? Covered by Nirvana on the 1992 EP Hormoaning D-7, a fictional Star Trek Klingon starship class
Businesses and organisations Dinar Líneas Aéreas (1992–2002), IATA airline designator D7 AirAsia X, IATA airline designator D7 Digital 7, a group of national governments seeking to strengthen the digital economy
Places D7 road (Croatia), a state road D7 motorway (Czech Republic) A Dublin postal district
Science, technology and mathematics Military D.VII aircraft (disambiguation), a number of aircraft Fokker D.VII, a German World War I fighter aircraft HMS Patroller (D07), a 1943 British Royal Navy escort aircraft carrier HMS D7, a Royal Navy submarine launched in 1911
Transportation and vehicles Bavarian D VII, an 1880 German steam locomotive model Caterpillar D7, a 1938 medium bulldozer Dewoitine D.7, a 1920s French sport plane Pennsylvania Railroad class D7, a steam locomotive LNER Class D7, a class of British steam locomotives ATS D7, a Formula One racing car D7 Super, a BSA Bantam motorcycle
Other ATC code D07, Corticosteroids, dermatological preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System D7 polytope, in 7-dimensional geometry d7, a d electron count DVCPRO (D-7), a professional digital video format
See also 7D (disambiguation)