Mark Dundas, 4th Marquess of Zetland

Lawrence Mark Dundas, 4th Marquess of Zetland, (28 December 1937 – 24 January 2026), informally known as Mark Zetland, was a British hereditary peer, known before 1989 as Earl of Ronaldshay. He was a member of the House of Lords from 1989 to 1999.

Early life and education Lord Zetland was the eldest son of Lawrence Dundas, 3rd Marquess of Zetland, and Penelope Pike. He was educated at Harrow School, where he was deputy head boy to Robin Butler and 12th man for the Eton-Harrow cricket match, and then read law at Christ's College, Cambridge, where he was a Half-Blue for Real tennis. He then joined the Grenadier Guards. On 28 December 2012 he was moved to the retired list upon reaching the mandatory retirement age of 75. Lord Zetland appeared as a contestant on the 4 August 1959 episode of To Tell the Truth. He resided at Aske Hall.

Lord Zetland was a significant figure in the administration of horse racing. He carried on as chairman and managing director of Redcar Racecourse until 2013, was a member of the Jockey Club, and was one of the founding directors of the British Horseracing Board in 1993. He was also a director of Aintree and Catterick racecourses and a steward at a number of other courses. Zetland also took part in horse racing as a racehorse owner and breeder.

Marriage and children Lord Zetland married Susan Chamberlin on 4 April 1964. They had four children:

Robin Lawrence Dundas, 5th Marquess of Zetland (born 5 March 1965). Lord James Edward Dundas (born 2 May 1967) Lady Henrietta Kate Dundas (born 9 February 1970) Lady Victoria Clare Dundas (born 2 January 1973)

Death Lord Zetland died on 24 January 2026, at the age of 88. He was succeeded in the marquessate and other titles by his elder son, Robin.