The golden-rumped euphonia (Chlorophonia cyanocephala) is a species of bird in the family Fringillidae, formerly placed in the Thraupidae. It is found in Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Trinidad and Tobago, and Venezuela. It was formerly classified in the genus Euphonia, but phylogenetic evidence indicates that it groups with Chlorophonia. Its natural habitats are subtropical or tropical moist lowland forest, subtropical or tropical moist montane forest, and heavily degraded former forest.