Agonopterix ciliella is a moth of the family Depressariidae.

The forewings are red-brown, sometimes sprinkled with dark fuscous; first discal stigma blackish, posteriorly edged with a white dot, and preceded by a blackish dot obliquely above it, second white, sometimes obscurely dark edged, usually preceded by a similar dot.

Hindwings pale whitish-fuscous, cilia reddish-tinged.

The larva is green; dorsal and subdorsal lines darker; dots black; head ochreous-yellowish; 2 with two blackish green crescentic marks.

The larvae feed on various umbelliferous plants, including Angelica sylvestris, Aegopodium podagraria, Heracleum sphondylium, Daucus, Selinum, Silaum, Chaerophyllum, Pastinaca, Anthriscus, Meum and Peucedanum palustre.