Ettrick, Roxburgh and Berwickshire (Gaelic: Eadraig, Rosbrog agus Siorrachd Bhearaig) is a county constituency of the Scottish Parliament covering part of the council area of Scottish Borders. 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.
The constituency was established for the 2011 Scottish Parliament election, and covers parts of the former constituencies of Tweeddale, Ettrick and Lauderdale and Roxburgh and Berwickshire. The remaining parts of the Scottish Borders form part of the Midlothian South, Tweeddale and Lauderdale constituency. The boundaries of the constituency remained unchanged following the Second Periodic Review of Scottish Parliament Boundaries undertaken by Boundaries Scotland ahead of the 2026 Scottish Parliament election.
Ettrick, Roxburgh and Berwickshire is currently held by the Conservatives. The current MSP is Rachael Hamilton, who won the seat at a 2017 by-election following the resignation of previous member John Lamont in order to contest the 2017 UK general election.
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; Dumfriesshire; East Kilbride; 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 Ettrick, Roxburgh and Berwickshire, the other eight constituencies were: Ayr; Carrick, Cumnock and Doon Valley; Dumfriesshire; East Lothian; Clydesdale; 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.
The rest of the Scottish Borders is represented in the Scottish Parliament by the Midlothian South, Tweeddale and Lauderdale constituency. The electoral wards of Scottish Borders Council used in the current creation of Ettrick, Roxburgh and Berwickshire are:
In April 2017, John Lamont announced his intention to resign his seat in the Scottish Parliament in order to contest the 2017 UK general election.