Agonopterix dammersi is a moth in the Depressariidae family. It was described by Clarke in 1947. It is found in North America, where it has been recorded from southern Arizona and California. The wingspan is 20–23 mm. The forewings are light greyish ochreous, irritated with black and with irregular patches of grey suffusion. There are two small black discal spots at the basal third and at the end of the cell. Between these is a large dark shade. There is a series of small black dots along the costa and around the termen. The hindwings are fuscous.