Ethmia bittenella is a moth in the Depressariidae family. It is found in the United States from southern Texas to southern and central Mexico (Chiapas and Guerrero) and then northward along the west coast to Sinaloa and Sonora. It is also found in north-western Costa Rica. The larvae possibly feed on Ehretia anacua. Pupae were collected in galleries in stems of Pseudabutilon lozani, which probably represents a pupation site only.