Mutton Hunk Fen Natural Area Preserve is a 412-acre (167 ha) Natural Area Preserve located in Accomack County, Virginia. Fronting on Gargathy Bay on the Atlantic Ocean side of the county, it is bounded by Whites Creek and Mutton Hunk Branch to its north. The property contains a rare sea level fen community, one of only four in Virginia. The vegetation consists of a combination of bog and tidal freshwater plants; five of the species on the land are locally-rare.