Phyllonorycter rileyella is a moth of the Gracillariidae family. It is known from Illinois, Missouri, Texas, Florida, Maine and Ohio in the United States. The wingspan is 6-8 mm. The larvae feed on Quercus species, including Quercus imbricaria, Quercus obtusifolia, Quercus rubra and Quercus stellata. They mine the leaves of their host plant. The mine has the form of a blotch mine on the underside of the leaf.