The Loch of Kirbister is a small, shallow, somewhat triangular-shaped loch located on Mainland Orkney, Scotland, in the parish of Orphir. It lies 5 mi (8.0 km) southwest of Kirkwall on a cultivated land between two hills. There is a small turf-covered islet known as the Groundwater of Holm just off the eastern shore of the loch. It measures 37 m by 19 m and exhibits stone traces of an oval structure and a small projecting pier. The loch is a popular spot for trout fishing. Located on the lodge of the loch is the Orkney Trout Fishing Association which operates a hatchery at the Kirbister pumphouse.