Ophiocordyceps coenomyia is an entomopathogenic fungus belonging to the order Hypocreales (Ascomycota) in the family Ophiocordycipitaceae. It is parasitic to awl-fly larvae. This species is characterized by a globose, alutaceous fertile part at the apex of its light yellow stroma, its immersed perithecia, and ascospores dividing in turn into partspores. The species is closely related to O. heteropoda.