Caithness, Sutherland and Easter Ross is a constituency of the House of Commons of the Parliament of the United Kingdom (Westminster).

[1] The constituency was created in 1997 by merging Caithness and Sutherland with an area from Ross, Cromarty and Skye which was abolished.

In 2005 the Westminster constituency was enlarged slightly, to include a small area from Ross, Skye and Inverness West.

Further to the 2023 review of Westminster constituencies which came into effect for the 2024 general election, it was enlarged again, this time significantly, to include the Black Isle, Dingwall and part of Wester Ross.

2024–present: The Highland Council wards of North, West and Central Sutherland, Thurso and Northwest Caithness, Wick and East Caithness, East Sutherland and Edderton, northern and eastern parts of Wester Ross, Strathpeffer and Lochalsh, Cromarty Firth, Tain and Easter Ross, Dingwall and Seaforth, Black Isle, and a small part of Aird and Loch Ness.