D46

D46 may refer to:
 * Cisitalia D46, an Italian racing car
 * D46 motorway (Czech Republic)
 * D46 road (Croatia)
 * HMS Dragon (D46), a Danae-class cruiser of the Royal Navy
 * HMS Winchelsea (D46), a W-class destroyer of the Royal Navy
 * Myelodysplastic syndrome
 * Semi-Slav Defense, a chess opening
 * String Quartet No. 4 (Schubert), by Franz Schubert