The red-mantled saddle-back tamarin (Leontocebus lagonotus) is a species of saddle-back tamarin, a type of small monkey from South America.

The red-mantled saddle-back tamarin was formerly considered to be a subspecies of the brown-mantled tamarin, L.

[2][3] It lives in Ecuador and Peru and its type locality is in Peru, near the confluence of the Amazon River and the Napo River.

[3] The IUCN rates it as least concern from a conservation standpoint.

This New World monkey-related article is a stub.