The Muir Mackenzie Baronetcy, of Delvine in the County of Perth, is a title in the Baronetage of the United Kingdom. It was created on 9 November 1805 for Alexander Muir Mackenzie. Born Alexander Muir, he had assumed the additional surname of Mackenzie on succeeding to the estates of his great-uncle John Mackenzie, of Delvine, Perthshire, third son of Sir Kenneth Mackenzie, 1st Baronet, of Coul (see Mackenzie baronets).
Kenneth Muir Mackenzie, 1st Baron Muir Mackenzie, was a younger son of the second Baronet and Georgina Muir Mackenzie was a daughter.
Sir Robert Cecil, 5th Baronet, was killed in action whilst serving the 5th Battalion (attached 9th Battalion), Durham Light Infantry on 12 April 1918. He lies in Bienvillers Military Cemetery in Pas-de-Calais, France.[1]
The heir apparent to the baronetcy is Archie Robert David Muir Mackenzie of Delvine, the Younger (born 1989), eldest son of the 7th Baronet.