Thomas Cooper, 1st Baron Cooper of Culross

Thomas Mackay Cooper, 1st Baron Cooper of Culross PC KC FRSE (24 September 1892 – 15 July 1956) was a Scottish politician, judge and historian.

Cooper was the son of John Cooper, of Edinburgh, a civil engineer, and Margaret, daughter of John Mackay, of Dunnet, Caithness. He was educated at George Watson's College, Edinburgh, and the University of Edinburgh.

Cooper was admitted a member of the Faculty of Advocates in 1915 and created a King's Counsel in 1927. He was Conservative Member of Parliament (MP) for Edinburgh West from a by-election in 1935 to 1941. In 1935 he was appointed Solicitor General for Scotland and later that year he was appointed as Lord Advocate. He also became a Privy Counsellor in 1935. In 1941 he became Lord Justice Clerk with the judicial title of Lord Cooper and in 1947 Lord Justice General and Lord President of the Court of Session. He resigned in 1954 and was created a peer as Baron Cooper of Culross, of Dunnet in the County of Caithness.