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) [XC173714]
by Jeremy Minns from Vidal Ramos, Santa Catarina, Brazil (song)
Green-chinned Euphonia (Euphonia chalybea) [XC470832]
by Bernabe Lopez-Lanus from Parque Municipal Montanhas de Teres\u00f3polis, Rio de Janeiro, Brazil (song)
Subspecies
Recent molecular-genetic analysis indicates that genus belongs in family Fringillidae.