Mary, Countess of Harold

Mary, Countess of Harold (née Lady Mary Tufton; 6 July 1701 – 19 February 1785) was an English aristocrat and philanthropist.

She was the eighth and youngest child of Thomas Tufton, 6th Earl of Thanet and Lady Catherine Cavendish, daughter of Henry Cavendish, 2nd Duke of Newcastle-upon-Tyne. Her father, a politician, was himself noted for his charitable giving. Her sisters included Lady Anne Tufton (d. 1757), who married James Cecil, 5th Earl of Salisbury, and Lady Margaret Tufton, who married Thomas Coke, 1st Earl of Leicester.

She was named in her father's will as an executor and administrator of the trust he established to provide for charities, including a school for poor children.