John Colum Crichton-Stuart, 7th Marquess of Bute

John Colum Crichton-Stuart, 7th Marquess of Bute (born 26 April 1958 in Rothesay, Isle of Bute), styled Earl of Dumfries before 1993 and from this courtesy title usually known as Johnny Dumfries, is a Scottish peer and a former racing driver, most notably winning the 1988 24 Hours of Le Mans. He does not use his title and prefers to be known solely as John Bute.

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 six years of study. As Marquess of Bute, he is clan chief of the Stuarts of Bute.