Ectoedemia platea is a moth of the family Nepticulidae. It was described by James Brackenridge Clemens in 1861. It is known from North America.
It was described from a larva feeding on Quercus species, and might be just a synonym, probably of Ectoedemia anguinella. The larva is described as purplish with a pale green vascular line and a row of reddish-brown dorsal dashes. However, the purple colour of the larva is not conclusive, as the colour is often produced in larvae which feed on leaves with autumnal colouration.