South-eastern Brazil (from Río de Janeiro south to central Rio Grande do Sul) and adjacent eastern Paraguay (Canindeyú south to Guairá and Itapuá) and north-eastern Argentina (Misiones and Corrientes).
 
Population
Estimated population is unknown (2010) and decreasing.
Status NT
Habitat destruction and degradation through urbanisation, industrialisation, agricultural expansion, colonisation and associated road-building, is the main threat.
For more information see BirdLife International Species Factsheet.
Green-chinned Euphonia (Euphonia chalybea) [XC109380]
by Douglas Meyer from Parque Estadual Lago Azul, Campo Mourao, Paran\u00e1, Brazil (call, chamados\/calls)
Green-chinned Euphonia (Euphonia chalybea) [XC84510]
by Jeremy Minns from Serra dos Orgaos National Park. Teresopolis, Brazil (call, song)
Subspecies
Recent molecular-genetic analysis indicates that genus belongs in family Fringillidae.