The Tres Marías amazon (Amazona oratrix tresmariae) is a subspecies of bird in subfamily Arinae of the family Psittacidae, the African and New World parrots.

[3] Frank Gill, Pamela Rasmussen and David Donsker in the list maintained on behalf of the International Ornithological Committee (IOC) treat the Tres Marías amazon as a subspecies.

BirdLife International's Handbook of the Birds of the World (HBW), the Clements taxonomy, and the Howard and Moore checklist all retain it as a subspecies of the yellow-headed amazon.

[9][12] As of early 2023 xeno-canto had no recordings of Tres Marías amazon vocalizations and the Cornell Lab of Ornithology's Macaulay Library had very few.

Illegal capture for the pet trade has caused much of the decline and ongoing habitat loss is another significant threat.

[12] The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) lists the yellow-headed amazon in Appendix I.