Diaphora sordida is a moth of the family Erebidae first described by Jacob Hübner in 1803.

[1] It is found in the Alps, the Pyrenees and the Apennines.

There are two generations per year, with adults on wing from April to June and again from July to August.

The larvae feed on various low-growing plants, including Galeopsis, Stellaria, Taraxacum and Plantago species.

The larvae can be found in late summer.