Pachyserica darjeelingensis is a species of beetle of the family Scarabaeidae. It is found in eastern Nepal and India (Sikkim, Darjeeling).
Adults reach a length of about 8.6-9.3 mm. They have a reddish to dark brown, elongate-oval body. The antennae are yellowish-brown and the dorsal surface is dull with white hairs and erect, long, thin setae.
The species is named for its occurrence in Darjeeling.