Mary Bruce, Countess of Elgin

Mary Hamilton Bruce, Countess of Elgin (née Nisbet; 18 April 1778 – 9 July 1855) was the first wife of British diplomat Thomas Bruce, 7th Earl of Elgin during his term as Ambassador Extraordinaire to the Ottoman Empire and one of the most influential and wealthiest heiresses of the late 18th and early 19th century.