Agonopterix rosaciliella is a moth in the Depressariidae family. It was described by Busck in 1904. It is found in North America, where it has been recorded from Alaska and western Saskatchewan through Washington to California and Arizona. The larvae feed on Angelica arguta, Angelica hendersonii, Conioselinum chinense, Ligusticum apiifolium, Oenanthe sarmentosa, Osmorhiza chilensis, Osmorhiza occidentalis and Echinopanax horridum.