Uig is a coastal island parish, which lies on the long island of Lewis and Harris in the Western Isles Council Area, some 18 miles (28 km) west of Stornoway and 18 miles (29 km) north of Tarbert in the Western Isles and includes 3 other small offshore islands.
It is located in the old county of Ross and Cromarty, which disappeared following the Local Government (Scotland) Act 1974.
The parish has an area of 550 sq. km (212.3 sq. miles). Uig has 4 neighbouring parishes; namely Barvas, Harris, Lochs and Stornoway. The boundaries of this parish were modified among significant changes recommended by the Boundary Commissioners after the Local Government (Scotland) Act 1889.