Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Panama, Peru, Suriname, Venezuela.
Introduced to USA (B).
Eastern Panama and Colombia southern and east through Ecuador, eastern Peru and northern Bolivia to central and north-eastern Brazil, Venezuela and the Guianas.
 
Population
Estimated population is unknown (2010).
Chestnut-fronted Macaw (Ara severus) [XC430024]
by Juan Sebastian Ulloa from Cristalino Jungle Lodge, Alta Floresta, Mato Grosso, Brazil (call)
Chestnut-fronted Macaw (Ara severus) [XC615740]
by Mauricio Cuellar Ramirez (@Birding.travel) from Puerto Boyac\u00e1, Boyac\u00e1, Colombia (?)
Subspecies
Usually treated as comprising two subspecies, with western populations (castaneifrons) being marginally larger, but differences likely to be clinal.