Agonopterix dierli is a moth in the Depressariidae family. It was described by Lvovsky in 2011. It is found in Nepal. The wingspan is 20–24 mm. The forewings are white with dark specks and a large black spot above the discal vein reaching the costal margin of the wing. The discal point is not marked with a black dotted line along the costal and outer margin. The hindwings are white.