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

It is found widely in shrubby and grassy areas from southern Mexico, through Central America, to the Chocó in Colombia and Ecuador.

It is replaced by the closely related chestnut-bellied seed finch in South America east of the Andes, as well as the valleys of Cauca and Magdalena in Colombia.

The male is almost entirely black, with a small white wing patch.

They are both very similar to the all-black Caribbean slope form of the variable seedeater.