D33, D.33 or D-33 may refer to:
Ships Almirante Garcia, an Almirante Clemente-class destroyer of the Venezuelan Navy , a Fletcher-class destroyer of the Brazilian Navy , a County-class heavy cruiser of the Royal Australian Navy , a D-class destroyer of the Royal Navy
Other uses Akaflieg Darmstadt D-33, a German experimental glider D33 road (Croatia) Dewoitine D.33, a French single-engined monoplane LNER Class D33, a class of British steam locomotives d33, the piezoelectric coefficient Tarrasch Defense, a chess opening