Archibald Henry Macdonald Sinclair, 1st Viscount Thurso, (22 October 1890 – 15 June 1970), known as Sir Archibald Sinclair between 1912 and 1952, and often as Archie Sinclair, was a British politician and leader of the Liberal Party.

John Archibald Sinclair, 3rd Viscount Thurso (born 10 September 1953), known also as John Thurso, is a Scottish businessman, Liberal Democrat politician and hereditary peer who is notable for having served in the House of Lords both before and after a period in the House of Commons.

a railway station located in Thurso, in the Highland council area in the far north of Scotland.