D37

D37 or D-37 may refer to:

Ships

 * BRAZILIAN DESTROYER Rio Grande do Norte, a Mato Grosso-class destroyer of the Brazilian Navy
 * HMAS Tobruk (D37), a Battle-class destroyer of the Royal Australian Navy
 * HMS Dasher (D37), an Avenger-class aircraft carrier of the Royal Navy
 * HMS Duncan (D37), a Type 45 destroyer of the Royal Navy
 * HMS Vortigern (D37), a V-Class destroyer of the Royal Navy

Rail transport

 * EMD D37, a traction motor equipping the New South Wales 42 class locomotive
 * PRR D37, a Pennsylvania Railroad locomotive

other uses

 * ASTM D37, a testing standard for cannabis
 * D-37C, the computer component of the all-inertial NS-17 Missile Guidance Set
 * D37D, a Minuteman III intercontinental ballistic missile flight computer
 * D37 road (Croatia)
 * Queen's Gambit Declined, a chess opening
 * Warren Municipal Airport (Minnesota)