List of Constituencies in the Parliament of Scotland at the time of the Union

List of Constituencies in the Parliament of Scotland at the time of the Union is a list of the constituencies of the Parliament of Scotland (the Estates of Scotland) during the period shortly before the Union between the Kingdom of Scotland and the Kingdom of England. The unicameral Estates of Scotland existed from medieval times until 1707.

The Commissioners for the burghs (the "Third Estate") and shires and stewartries (sometimes called the "Fourth Estate", or classified as a subgroup within the "Second Estate") were elected, but on a very restrictive franchise. Commissioner was the title for ordinary, representative members of the parliament (junior peers were called Lords of Parliament; and senior peers, representatives of the monarch, and certain members of the clergy also sat in parliament).

The Scottish ministers (the Privy Council of Scotland), were not answerable to the Estates of Scotland but to the Scots monarch (which, after the Union of Crowns in 1603, usually meant de facto to the Privy Council of England, which had the opportunity to advise a king or queen resident in London). The Parliament of Scotland was abolished when it merged with the Parliament of England to create the new Parliament of Great Britain, in 1707 under the Acts of Union.