John Colum Crichton-Stuart, 7th Marquess of Bute (26 April 1958 – 22 March 2021), styled Earl of Dumfries before 1993, was a Scottish peer and a racing driver, most notably winning the 1988 24 Hours of Le Mans. He did not use his title and preferred to be known solely as John Bute, although he had previously been called Johnny Dumfries before his accession to the Marquessate. The family home is Mount Stuart House on the Isle of Bute. He attended Ampleforth College, as had his father and most male members of the Crichton-Stuart family, but did not finish the normal five years of study.