It is endemic to the Sierra Madre del Sur of Guerrero state in southern Mexico.

[1] Magnolia guerrerensis is endemic to central Sierra Madre del Sur of Guerrero state in southern Mexico, where it is found in the municipalities of Leonardo Bravo, General Heliodoro Castillo, and Quechultenango.

[1] Magnolia guerrerensis grows in montane cloud forests, from 1,950 to 2,400 meters elevation.

It grows in soils with abundant leaf litter, in association with species of pine, oak, Persea, and Clethra.

It is threatened with habitat loss from excessive timber harvesting and conversion of forest lands to agriculture and livestock pasture.