Delias aroae is a butterfly in the family Pieridae. It was described by Carl Ribbe in 1900. It is found in New Guinea (Aroa River).
The wingspan is about 38 mm. The male forewing above pure white with a black, oblique ,very broad apical spot The distal margin of the otherwise pure white hindwing is adorned with a narrow black band, which is somewhat narrowed from the costa to the anal angle. The under surface as in geraldina Gr.-Sm. and cuningputi, but with white median and basal regions on the forewing and a strongly divided black basal part to the hindwing, on which are placed 2 larger yellow patches. The subterminal spots of the hindwing are pure yellow, isolated, much larger than in cuningputi. The under surface of the female bears 3 median and 4 submarginal patches, which are much smaller and more orange-yellow than in the male.