| Honorific-Prefix: | The Hon |
| Sir Robert Mackenzie | |
| Honorific-Suffix: | |
| Order1: | 3rd |
| Office1: | Premier of Queensland |
| Term Start1: | 15 August 1867 |
| Term End1: | 25 November 1868 |
| Predecessor1: | Robert Herbert |
| Successor1: | Charles Lilley |
| Constituency1: | Burnett |
| Order2: | 1st |
| Office2: | Treasurer of Queensland |
| Term Start2: | 15 December 1859 |
| Term End2: | 4 August 1862 |
| Predecessor2: | New position |
| Successor2: | Thomas Moffatt |
| Constituency2: | Burnett |
| Term Start3: | 15 August 1867 |
| Term End3: | 25 November 1868 |
| Predecessor3: | Thomas Blacket Stephens |
| Successor3: | Thomas Henry FitzGerald |
| Constituency3: | Burnett |
| Constituency Am4: | Burnett |
| Assembly4: | Queensland Legislative |
| Term Start4: | 4 May 1860 |
| Term End4: | 6 April 1869 |
| Predecessor4: | New seat |
| Successor4: | Charles Haly |
| Alongside4: | Charles Haly, John Edwards, Ratcliffe Pring |
| Birth Date: | 21 July 1811 |
| Birth Place: | Ross-shire, Scotland, United Kingdom |
| Death Place: | London, United Kingdom |
| Nationality: | British |
| Spouse: | Louisa Alexandrina Jones (m.1846 d.1906) |
| Relations: | Sir George Mackenzie, 7th Baronet (father) |
| Occupation: | Magistrate, Grazier |
Sir Robert Ramsay Mackenzie, 10th Baronet (21 July 1811 – 19 September 1873) was a pastoralist and politician in Queensland, Australia. He was Premier of Queensland, Australia from August 1867 to November 1868.
Mackenzie was born in Coul, Ross-shire, Scotland, fourth son of Sir George Steuart Mackenzie, and wife Mary, fifth daughter of Donald Macleod of Geanies, Ross-shire.
In April 1832 Mackenzie arrived on the Wave in Sydney, New South Wales, with £750 joining his brother James. He purchased sheep for £500 and grazed them at Riddlesdale (near Dungog, New South Wales). After land speculation with his brother James, Robert Mackenzie bought a station, got into debt and borrowed money from his Scottish relatives. His financial situation worsened and he was declared bankrupt in 1844. In 1846 he was discharged from bankruptcy and was appointed a magistrate in 1847, living in Clifton, New England.
Queensland was declared a separate colony in 1859, Mackenzie became involved with politics and became Colonial Treasurer on 15 December 1859 in the ministry of Robert Herbert. Mackenzie represented Burnett in the Legislative Assembly of Queensland 1860–1869. Mackenzie formed a government on the resignation of Arthur Macalister, taking the roles of both Premier and Colonial Treasurer. He resigned on 25 November 1868.
Robert Mackenzie married Louise Alexandrina Jones, daughter of Richard Jones, a member of the New South Wales Legislative Council, Sydney, in 1846.[1] One of their daughters, Mary Louisa, married Alexander Archer, a brother of Archibald Archer. Both Mary and Alexander died in the 1890 sinking of the RMS Quetta.
Robert Mackenzie succeeded his brother William on his death on 21 December 1868 to the baronetcy and returned to live on the family estate in Scotland in 1871. Sir Robert died at 6 Atherstone Terrace, Queen’s Gate Gardens, London on 19 September 1873.
Additional resources listed by the Australian Dictionary of Biography