Dumfriesshire (Gaelic: Siorrachd Dhùn Phris) is a county constituency of the Scottish Parliament covering part of the council area of Dumfries and Galloway. Under the additional-member electoral system used for elections to the Scottish Parliament, it elects one Member of the Scottish Parliament (MSP) by the first past the post method of election. It is also one of ten constituencies in the South Scotland electoral region, which elects seven additional members, in addition to the ten constituency MSPs, to produce a form of proportional representation for the region as a whole.
Created for the 2011 Scottish Parliament election, the constituency comprises areas that were previously part of the old Dumfries and Galloway and Upper Nithsdale constituencies, which were abolished and replaced by Dumfriesshire and Galloway and West Dumfries. The seat is largely identical to the historic county of Dumfrieshire.
The seat has been held by Oliver Mundell of the Scottish Conservatives since the 2016 Scottish Parliament election. Mundell is the son of former Secretary of State for Scotland, David Mundell who holds the Westminster seat of Dumfriesshire, Clydesdale and Tweeddale.
Following the second periodic review of Scottish Parliament boundaries in 2025, the other nine constituencies of the South Scotland region are: Ayr; Carrick, Cumnock and Doon Valley; Clydesdale; East Kilbride; Ettrick, Roxburgh and Berwickshire; Galloway and West Dumfries; Hamilton, Larkhall and Stonehouse; Kilmarnock and Irvine Valley; and Midlothian South, Tweeddale and Lauderdale. The region covers the whole of the council areas of Dumfries and Galloway, Scottish Borders, and South Ayrshire council areas; and parts of the council areas of East Ayrshire, Midlothian, and South Lanarkshire. By population it is now the largest of Scotland's eight electoral regions.
Prior to the 2025 review, there were nine constituencies in the South Scotland region. Besides Dumfriesshire, the other eight constituencies were: Ayr; Carrick, Cumnock and Doon Valley; Clydesdale; East Lothian; Ettrick, Roxburgh and Berwickshire; Galloway and West Dumfries; Kilmarnock and Irvine Valley; and Midlothian South, Tweeddale and Lauderdale. The region covered the Dumfries and Galloway, East Ayrshire, Scottish Borders and South Ayrshire council areas in full and parts of the East Lothian, Midlothian and South Lanarkshire council areas.
Dumfries and Galloway is represented in the Scottish Parliament by two constituencies: Dumfriesshire and Galloway and West Dumfries. Dumfriesshire covers the eastern part of the council area. The town of Dumfries is divided between the two constituencies.
The seat remained largely unchanged following the Second Periodic Review of Scottish Parliament Boundaries undertaken by Boundaries Scotland ahead of the 2026 Scottish Parliament election, although there was a minor ammendment to alter the section of the boundary with Galloway and West Dumfries that follows the River Nith: previously this had followed the riverbank, the review moved this to the centre of the river to align with ward boundaries. The electoral wards of Dumfries and Galloway Council used in the current creation of Clydesdale are:
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