South-eastern Brazil (southern Mato Grosso do Sul east to Espíritu Santo, south to Rio Grande do Sul), eastern Paraguay and northern Argentina (Misiones).
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010).
Rufous-crowned Greenlet (Hylophilus poicilotis) [XC606699]
by Dante Buzzetti from Mata dos Caet\u00e9s, Vargem Alta-ES, Esp\u00edrito Santo, Brazil (song)
Rufous-crowned Greenlet (Hylophilus poicilotis) [XC422358]
by JAYRSON ARAUJO DE OLIVEIRA from Vila residencial usina GPS Copel, Antonina, Paran\u00e1, Brazil (song)
Subspecies
No subspecies.
Formerly treated as conspecific with Grey-eyed Greenlet (Hylophilus amaurocephalus), with which partly sympatric, but appears to be clearly differentiated by plumage, eye colour, vocalizations and habitat preference. Previously reported hybridization between the two explained as being due to presence of a "residual cline" that reflects geographical variation of the ancestor.