The chestnut-bellied seed finch (Sporophila angolensis) is a species of bird in the family Thraupidae, but was until recently placed in Emberizidae.

It has been replaced west of the Andes (and in Central America) by the closely related thick-billed seed finch (S. funerea).

The chestnut-bellied seed finch was formally described by the Swedish naturalist Carl Linnaeus in 1766 in the twelfth edition of his Systema Naturae under the binomial name Loxia angolensis.

[2] Linnaeus based his description on "The Black Gros-Beak" that had been described and illustrated in 1764 by the English naturalist George Edwards.

[7][8] The chestnut-bellied seed finch was therefore moved to Sporophila, a genus that had been introduced by the German ornithologist Jean Cabanis in 1844.