Mary Stuart, Countess of Bute

The Right Honourable The Countess of Bute
Lady Bute in 1780
Born	Mary Wortley Montagu (1718-01-19)19 January 1718 Constantinople, Ottoman Empire
Died	6 November 1794(1794-11-06) (aged 76) Isleworth, England
Resting place	St Leonard's Churchyard, Wortley, South Yorkshire, England
Nationality	British
Known for	Spouse of the prime minister of Great Britain (1762–1763)
Spouse	John Stuart, 3rd Earl of Bute ​ ​ (m. 1736; died 1792)​
Children	11, including: John Stuart, 1st Marquess of Bute Hon. James Stuart Hon Frederick Stuart Hon. Charles Stuart Hon. William Stuart Lady Louisa Stuart
Parent(s)	Sir Edward Wortley Montagu Lady Mary Pierrepont

Mary Stuart, Countess of Bute, 1st Baroness Mount Stuart (née Wortley Montagu; 19 January 1718 – 6 November 1794) was the wife of British nobleman John Stuart, 3rd Earl of Bute, who served as Prime Minister from 1762 to 1763.