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