Habromys schmidlyi, sometimes known as Schmidly's deer mouse, is a species of rodent in the family Cricetidae found only in Mexico. Its natural habitat is cloud forest in the Sierra de Taxco, on the border of Guerrero and Mexico states, at elevations between . It is a nocturnal species, and is thought to be omnivorous.
H. schmidlyi is a small species within its genus, measuring in length with a tail. Adults weigh . It is a cinnamon to reddish brown coloured rodent with black ears, a dark, hairy tail, white underparts and brownish hindfeet.
The name "Schmidly's deer mouse" is ambiguous, as it is shared by another species, Peromyscus schmidlyi.