South-eastern Brazil (southern Mato Grosso do Sul east to southern Minas Gerais and Espírito Santo, south to central Rio Grande do Sul), south-eastern Paraguay, and extreme north-eastern Argentina.
 
Population
Estimated population is unknown (2012) and decreasing.
Greenish Tyrannulet (Phyllomyias virescens) [XC56292]
by Jeremy Minns from Palho\u00e7a, Santa Catarina, Brazil (song)
Greenish Tyrannulet (Phyllomyias virescens) [XC81681]
by Fernando Igor de Godoy from Estrada da Graciosa, Paran\u00e1 state, Brazil (song)
Subspecies
No subspecies.
Phyllomyias virescens (Sibley and Monroe 1990, 1993) has been split into Greenish Tyrannulet (Phyllomyias virescens) and Urich's Tyrannulet (Phyllomyias urichi) following SACC (2005).
Genus as presently constituted may be polyphyletic. Anatomical evidence suggests that Planalto Tyrannulet (Phyllomyias fasciatus), Grey-capped Tyrannulet (Phyllomyias griseocapilla) and Sooty-headed Tyrannulet (Phyllomyias griseiceps) may be unrelated to others of genus, some or all of which possibly better placed in resurrected genus Tyranniscus. Formerly placed along with Sclater's Tyrannulet (Phyllomyias sclateri) in a separate genus, Xanthomyias. Appears to form a superspecies with Reiser's Tyrannulet (Phyllomyias reiseri) and Urich's Tyrannulet (Phyllomyias urichi) and all were for long considered conspecific, but differences in morphology (plumage pattern, wing and tail proportions), degree of sexual dimorphism, habitat and voice evident. Has been suggested that Sclater's Tyrannulet (Phyllomyias sclateri) also belongs in this group.