Mary Sackville (1746 – 30 September 1778) was a British noblewoman.
Biography Mary was the daughter of Lord John Sackville and Lady Frances Leveson-Gower. She married Sackville Tufton, 8th Earl of Thanet.
Issue She and her husband Sackville Tufton, 8th Earl of Thanet had seven children:
Elizabeth Tufton (died 1768) Sackville Tufton, 9th Earl of Thanet Charles Tufton, 10th Earl of Thanet Caroline Tufton (born 1771), who married Joseph Foster Barham John Tufton, a noted cricketer Henry Tufton, 11th Earl of Thanet Edward William Tufton (1777–1786), who died by drowning
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