Diplopseustis perieresalis is a species of moth in the Crambidae family. It is widespread in the Oriental region, Australia and New Zealand, but has was introduced to the Western Palaearctic ecozone, where it quickly expanded its range, and where it is now found in Great Britain, the Netherlands, Belgium, Germany, France, Switzerland, Spain, Portugal and the Canary Islands. In the Afrotropics, it has been recorded from Sudan. The wingspan is about 15 mm. The larvae possibly feed on Carex secta.