Depressaria alienella

''Depressaria alienella'' is a moth in the Depressariidae family. It was described by August Busck in 1904. It is found in North America, where it has been recorded from Yukon to Nova Scotia, south to New England, Arizona and California.

The wingspan is 18–21 mm. The forewings are light fuscous overlaid with red or reddish fuscous, irrorated with cinereous and fuscous and streaked with blackish fuscous. There is a white discal spot at the end of the cell, preceded and followed by fuscous. There is an ill-defined row of fuscous spots around the termen. The hindwings are pale grey with light brownish shading in the outer half. Adults are on wing from July to September.

The larvae feed on the flowers of ''Artemisia'' and ''Achillea'' species.