Vementry is an uninhabited island in Shetland, Scotland, on the north side of the West Mainland , lying south of Muckle Roe.

The island has an area of approximately 3 km². It is known for its well-preserved chambered cairn, and the two First World War gun emplacements which overlook the narrow entrance into the former naval anchorage of Busta Voe .

Vementry is also the name of a small farm on the Shetland Mainland, immediately south of the island. There is no ferry service to the island, although the shepherd on the mainland farm occasionally makes the short trip to work with stock on the island.

Vementry Isle is separated from Vementry mainland by a narrow channel or "sound", consisting of Uyea Sound to the east and Cribba Sound to the west. Cribba Sound is famed for the quality of mussels produced at the mussel farms located there.