Garbh Eileach is an uninhabited island in the Inner Hebrides of the west coast of Scotland that lies in the Firth of Lorn between Mull and Argyll.

With an area of 142 ha (351 acres) it is the largest of the Garvellachs and reaches a maximum elevation of 110 m (361 ft) above sea level.

[6] There is a small anchorage and landing place on Garbh Eileach where there are the remains of a burial ground and of a fort that measures about 14 m by 11 m.[4][10][11] About 650 m (2,130 ft) northeast of this dun, which may be of late prehistoric date, there are the ruins of a much later house and byre with a corn-drying kiln a short distance away, probably erected in the late 18th or 19th century.

[9] During the medieval period the island was part of Maclean of Duart's landholdings but in 1666 it was granted by the 9th Earl of Argyll to John MacLachlan of Kilbride and let to his tacksmen for most of the 18th century.

[9] Garbh Eileach had a population of thirty-two adults in the late 17th century but only four houses were occupied by 1861, and from then on it is likely that only the shepherd's cottage near the landing-place remained habitable.