Acronicta albarufa, the barrens dagger moth, is a moth of the family Noctuidae. It has a fragmented distribution in North America that includes southern Ontario and Manitoba, New York, New Jersey, Massachusetts, North Carolina, Virginia, Georgia, Oklahoma, Missouri, Arkansas, and Colorado. It may also be present in Ohio, Pennsylvania, Connecticut, mainland New York and New Mexico. It has been suggested that populations in the south-western United States may be a separate species. It is listed as a species of special concern and believed extirpated in the US state of Connecticut.

The larvae feed on Quercus ilicifolia, though other oak leaves have been used.

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