Hyposmocoma blackburnii is a species of moth of the family Cosmopterigidae. It was first described by Arthur Gardiner Butler in 1881. It is endemic to the Hawaiian island of Maui. The type locality is Haleakalā.
The larvae have been recorded in dead wood of Acacia koa.
. Elwood Zimmerman . 1978 . Insects of Hawaii . 9 Microlepidoptera . The University Press of Hawaii, Honolulu. 10125/7338 .