Aberdeenshire or the County of Aberdeen is a historic county and registration county of Scotland. The area of the county, excluding the Aberdeen City council area itself, is also a lieutenancy area. The county borders Kincardineshire, Angus and Perthshire to the south, Inverness-shire and Banffshire to the west, and the North Sea to the north and east. It has a coast-line of 65 miles (105 km). The county gives its name to the modern Aberdeenshire council area, which covers a larger area than the historic county.

The shires of Scotland, or counties of Scotland, are historic subdivisions of Scotland established in the Middle Ages and used as administrative divisions until 1975. Originally established for judicial purposes, from the 17th century they started to be used for local administration purposes as well. The areas used for judicial functions (sheriffdoms) came to diverge from the shires, which ceased to be used for local government purposes after 1975 under the Local Government (Scotland) Act 1973.