D55

D55 may refer to :

and also:
 * roads in various countries:
 * D55 road (Croatia), a state route in Croatia
 * D55 motorway (Czech Republic), a motorway in the Czech Republic
 * D55 road (Nord), a "départementale" road in Nord département in France
 * HMAS Parramatta (D-55), a 1910 River class torpedo boat destroyer from the Australian Navy
 * two ships of the Royal Navy :
 * HMS Smiter (D55), a 1943 Bogue-class auxiliary aircraft carrier
 * HMS Finisterre (D55), a Battle-class destroyer
 * INS Ranvijay (D55), a 1988 Rajput class destroyer from the Indian Navy
 * CIE Standard Illuminant D55, a lighting standard used in colorimetry
 * Robertson Field (North Dakota) FAA code
 * the ICD-10 code for an anaemia due to enzyme disorders
 * New South Wales D55 class locomotive, a NSWGR steam locomotive