Enargia fausta is a moth of the family Noctuidae. It is restricted to the boreal forest and boreal-deciduous forest transition zone, and does not range south along the Rocky Mountains nor as far north. Specimens examined range from central Alberta to New Brunswick and in the East as far south as the Ottawa River Valley, but the species presumably also occurs in appropriate habitats in northern New York and New England. Ferguson (1954) illustrates a specimen from Glennville, Nova Scotia. Reports of this species from north-eastern Ohio need to be verified.