D30 may refer to:
Vehicles Aircraft Dewoitine D.30, a French passenger monoplane Ships , a Pará-class destroyer of the Brazilian Navy , a Garcia-class destroyer of the Brazilian Navy , a Danae-class light cruiser of the Royal Navy , a W-class destroyer of the Royal Navy Surface vehicles Levdeo D30, a Chinese hatchback LNER Class D30, a class of British steam locomotives
Other uses 122 mm howitzer 2A18 (D-30), a Soviet howitzer Canon EOS D30, a digital single lens reflex camera D30 road (Croatia) Queen's Gambit Declined, a chess opening Soloviev D-30, a Soviet turbofan engine d30, a die with 30 sides
See also D3O, with a letter "O" instead of a zero