D65

D65 may refer to:

Illuminant D65, a commonly used standard illuminant defined by the International Commission on Illumination
Greek destroyer Nearchos (D65)
HMS Codrington (D65), a 1930 A-class destroyer of the Royal Navy
HMS St. James (D65), a 1946 Battle-class destroyer of the Royal Navy
SPS Blas de Lezo (D65), a Spanish Navy ship
INS Chennai (D65), an Indian Navy ship
the former designation for the Slovakian R1 expressway
D 65 road (United Arab Emirates) (Al Manara Road), a road passing in Umm Suqeim