The Peruvian Tyrannulet (Zimmerius viridiflavus) is a species of bird in the Tyrannidae family. As traditionally defined, it is endemic to Peru, but recent genetic evidence suggests it should include the taxon flavidifrons as a subspecies, in which case the range of the Peruvian Tyrannulet extends into far southern Ecuador. Alternatively, flavidifrons is sometimes considered a separate species, the Loja Tyrannulet, but it is not closely related to the Golden-faced Tyrannulet as previously believed.

The natural habitat of the Peruvian Tyrannulet is subtropical or tropical moist montanes.