Ethmia arctostaphylella is a moth in the Depressariidae family. It is found in the United States and Mexico from southern Oregon and northern California, southward to the Sierra San Pedro Martir in Baja California and eastward in southern Nevada (Mount Charleston) and Arizona (the Pinaleno Mountains and Oak Creek Canyon). The range possibly extends northward in Oregon and into Utah following the distribution of its host plants. The larvae feed on Eriodictyon species, including Eriodictyon californicum, Eriodictyon tomentosum, Eriodictyon trichocalyx and possibly Eriodictyon angustifolium.