Peniophora cinerea is a species of fungus in the family Peniophoraceae.

It is a plant pathogen infecting black walnut (Juglans nigra).

It was first described as a species of Corticium by Christiaan Hendrik Persoon in 1797.

Mordecai Cubitt Cooke transferred it to Peniophora in 1879.

[1] It is found in Asia and North America.