He was the son of George Blakiston and his wife Elizabeth Kay, daughter of Matthew Kay. He was an Alderman of London from 1750 to 1769, was elected Sheriff of London in 1754 and became the 442nd Lord Mayor of London in 1761. He was knighted at Kensington Palace in 1759 and was created a Baronet, of the City of London on 22 April 1763. Blakiston served as colonel of the Green Regiment of the London Militia. He died at Jermyn Street in London.
Blakiston married firstly Margaret Hall, daughter of Reverend Charles Hall. His second wife Mary Blew died in 1754 and Blakiston married thirdly Annabella Bayley, daughter of Thomas Bayley in St Johns, London on 8 April 1760. He had a son by his first wife and two sons by his third wife. He was succeeded in the baronetcy by his second and only surviving son, Matthew.
- "Leigh Rayment - Baronetage". Retrieved 25 April 2009.
- "ThePeerage - Sir Matthew Blakiston, 1st Bt". Retrieved 18 March 2007.
- Debrett, John (1824). Debrett's Baronetage of England. vol. I (5th ed.). London: G. Woodfall. p. 475.
- Kimber, Edward (1771). Richard Johnson, ed. The Baronetage of England: Containing a Genealogical and Historical Account of All the English Baronets. vol. III. London: Thomas Wotton. p. 194.
- The London Gazette: . 12 April 1763. Retrieved 25 April 2009.
- Peter Cunningham, ed. (1861). Bohn's English Gentlemen's Library: Horace Walpole's Letters. vol. II. London: Henry G. Bohn. p. 216.
- Burke, Bernhard (1898). Peter Ashworth Burke, ed. A Genealogical and Heraldic History of the Colonial Gentry 1891-1895. vol. I. London: Harrison. p. 499.
- Burke, John (1832). A Genealogical and Heraldic History of the Peerage and Baronetage of the British Empire. vol. I (4th ed.). London: Henry Colburn and Richard Bentley. p. 117.
Sir Thomas Chitty
|Lord Mayor of London
Sir Samuel Fludyer
|Baronetage of Great Britain|
1763 – 1774
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