| Honorific Prefix: | The Most Honourable |
| The Marquess of Zetland | |
| Office: | Member of the House of Lords |
| Status: | Lord Temporal |
| Term Label: | as a hereditary peer |
| Term Start: | 5 October 1989 |
| Predecessor: | The 3rd Marquess of Zetland |
| Term End: | 11 November 1999 |
| Successor: | Seat abolished |
| Birth Name: | Lawrence Mark Dundas |
| Birth Date: | 28 December 1937 |
| Party: | Conservative |
Lawrence Mark Dundas, 4th Marquess of Zetland, (born 28 December 1937), less formally known as Mark Zetland, is a British hereditary peer, known before 1989 as Earl of Ronaldshay.
Lord Zetland is the eldest son of Lawrence Dundas, 3rd Marquess of Zetland, and Penelope Pike. He was educated at Harrow School and Christ's College, Cambridge, and then joined the Grenadier Guards. He succeeded to the marquessate and other titles upon the death of his father in 1989.
He is the elder brother of rock musician Lord David Dundas.
Lord Zetland was appointed a Deputy Lieutenant (DL) of the County of North Yorkshire on 6 May 1994.[1] 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 currently resides at Aske Hall.[2]
Lord Zetland married Susan Chamberlin on 4 April 1964. They have four children:[3]