Ethmia randyjonesi is a moth in the Depressariidae family. It is found in Costa Rica, where it has been recorded from the Cordillera Volcánica de Guanacaste, Tilarán and Cordillera Volcánica Central at altitudes ranging from 500 to 1,200 meters. The habitat consists of rain forests. The length of the forewings is 15.9–16.4 mm for males and 16.4–16.7 mm for females. The ground color of the forewings is whitish, with a series of elongated dark markings. The hindwing ground colour is whitish, becoming brownish at the apex.