Kirkcudbrightshire, or the County of Kirkcudbright or the Stewartry of Kirkcudbright is one of the historic counties of Scotland, covering an area in the south-west of the country. Until 1975, Kirkcudbrightshire was an administrative county used for local government. Since 1975, the area has formed part of Dumfries and Galloway for local government purposes. Kirkcudbrightshire continues to be used as a registration county for land registration. A lower-tier district called Stewartry covered the majority of the historic county from 1975 to 1996. The area of Stewartry district is still used as a lieutenancy area. Dumfries and Galloway Council also has a Stewartry area committee.

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.