Hermitage Castle is a semi-ruined castle in the border region of Scotland. It stands in the remote valley of the Hermitage Water, part of Liddesdale in Roxburghshire. It is under the care of Historic Scotland. The castle has a reputation, both from its history and its appearance, as one of the most sinister and atmospheric castles in Scotland.

The Scottish Borders is one of 32 council areas of Scotland. It is bordered by West Lothian, Edinburgh, Midlothian, and East Lothian to the north, the North Sea to the east, Dumfries and Galloway to the south-west, South Lanarkshire to the west, and the English ceremonial counties of Cumbria and Northumberland to the south. The largest settlement is Galashiels, and the administrative centre is Newtown St Boswells.