| Honorific Prefix: | The Right Honourable |
| The Earl of Cromartie | |
| Birth Name: | John Ruaridh Blunt Grant Blunt-Mackenzie |
| Residence: | Castle Leod |
| Known For: | Chief of Clan Mackenzie |
| Spouse: | |
| Children: | 3 |
| Parents: | Roderick Grant Francis Mackenzie, 4th Earl of Cromartie |
John Ruaridh Grant Mackenzie, 5th Earl of Cromartie (born 12 June 1948) is a Scottish engineer and peer. He is the current chief of Clan Mackenzie.[1] [2]
He is the only child of Roderick Mackenzie, 4th Earl of Cromartie and his second wife, the former Olga (née Laurence) Mendoza (d. 1996).[1] His mother, who was previously married to Peter Mendoza, was a daughter of Stuart Laurance of Paris. From his father's first marriage to Dorothy Downing Porter, he has two elder half-sisters, Lady Julia Blunt-Mackenzie and Lady Gilean Blunt-Mackenzie.
His paternal grandmother was Lady Sibell Lilian Mackenzie, suo jure Countess of Cromartie, who married his grandfather, Lt.-Col. Edward Walter Blunt later Blunt-Mackenzie DL (the eldest son of Maj.-Gen. Charles Harris Blunt of Adderbury Manor).
He was educated at Rannoch School, Perthshire and at Strathclyde University, Glasgow, Lanarkshire, Scotland.[1]
Lord Cromartie is registered as a Member of the Institution of Explosives Engineers (M.I.Exp.E.) as an explosives engineer.[1]
He has held the position of Chief of Clan Mackenzie since 1980, he wrote the SMC climbing guidebook Selected Climbs in Skye, which was published in 1982.[3] He succeeded to the titles of 5th Baron Castlehaven, of Castlehaven, 5th Viscount Tarbat, of Tarbat, 5th Baron MacLeod of Castle Leod, and 5th Earl of Cromartie on 13 December 1989.[1]
The seat of the Earl is at Castle Leod, Strathpeffer, Ross-shire.[1]
Cromartie married firstly Helen Murray, daughter of John Murray, a steelworker at Lanarkshire, in 1973, and divorced in 1983, by whom he had an only son:[4]
He married secondly Janet Clare Harley, daughter of Christopher James Harley of Strathpeffer, Ross-shire, in 1985. They have two sons:[1]