Marasmius munyozii is a species of fungus in the large agaric genus Marasmius.

It is found in Chile, where it grows on dead grass leaves.

The cap is white, with a pale cinnamon-ochraceous colored center and a slightly grooved margin.

The fungus was described as new to science in 1969 by mycologist Rolf Singer.

This Marasmiaceae article is a stub.