Thudaca circumdatella is a moth in the family Depressariidae.

It is found in Australia, where it has been recorded from New South Wales.

The forewings are snow white with a suffused brownish-ochreous streak along the basal half of the costa, attenuated and very indistinct posteriorly.

There is a straight brownish-orange subdorsal streak from the base to the anal angle, the upper edge with short triangular projection near the extremity.

This article on a moth of the subfamily Hypertrophinae is a stub.