Guettarda insularis is a species of flowering plant.

It is a large shrubby tree native to Socorro Island, the largest of the Revillagigedo Islands which lie west of Mexico's Pacific coast.

[2] Guettarda insularis is prominent in Socorro's higher-elevation forests, which occur between 350 and 850 meters (1,150 and 2,790 ft) elevation.

Other forest canopy trees include Ilex socorroensis, Sideroxylon socorrense, and Psidium oligospermum.

[3] The fruit of the tree is eaten by the Socorro parakeet (Psittacara brevipes).