Eudonia vinasalis is a moth in the Crambidae family. It was described by Dyar in 1929. It is found in Costa Rica. The wingspan is about 10 mm. The markings on the wings are similar to those of Eudonia crassiuscula, but smaller and more delicate. The marks are more smooth and even, the terminal space contrastingly dark, with a pale blotch centrally. The groundcolour has a tint of lilaceous, especially in females. Adults have been recorded on wing in January, May and November.