Euxoa muldersi is a moth of the family Noctuidae. It is known only from north central Canada with all specimens except two from the vicinity of Arviat, Nunavut. It is restricted to open dunes where it flies close to the sand. The species is believed to use a similar pheromone to Euxoa churchillensis as males ofE. churchillensis were observed being attracted to calling E. muldersi females, although no attempts at mating were observed.