Argyll, Bute and South Lochaber is a constituency of the House of Commons in the UK Parliament.

[1] Further to the completion of the 2023 Periodic Review of Westminster constituencies, it was first contested at the 2024 general election, since when it has been held by Brendan O'Hara of the Scottish National Party, who had been MP for the predecessor seat of Argyll and Bute from 2015 to 2024.

The vast majority of the new constituency comprises the area of the abolished constituency of Argyll and Bute, which was coterminous with Argyll and Bute Council, and comprises the following wards:[2] In order to meet the electorate size requirements, the following area of the Highland Council has been added from the abolished constituency of Ross, Skye and Lochaber: