Gasker is a small uninhabited islet in the Outer Hebrides of Scotland, 8 kilometres (4+1⁄2 nautical miles) southwest of Scarp, off the west coast of Harris.

Gasker

Scottish Gaelic name	Gàisgeir
Location
Gasker Gasker shown within the Outer Hebrides
OS grid reference	NA970151
Coordinates	57°59′00″N 7°17′13″W / 57.98343°N 7.28699°W / 57.98343; -7.28699
Physical geography
Island group	Harris and Lewis
Area	20 ha (1⁄8 sq mi)
Highest elevation	32 m (105 ft)
Administration
Sovereign state	United Kingdom
Country	Scotland
Council area	Western Isles
Demographics
Population	0
References	[1][2]

The low-lying island has never been inhabited. In spite of its small size, it has several small pools of fresh water. It is principally noted for its large well-established seal colony. Residents of Scarp once visited Gasker regularly to kill seals for food.

There are two feasible landing spots for small craft: Geo Iar on the north side of Gasker, and Geodha Ear on the south side. A small unmanned lighthouse was built by the Northern Lighthouse Board in 1997.

1.2 kilometres (5⁄8 nmi) east-southeast lies the smaller islet of Gàisgeir Beag, and some surrounding rocks.