Mary, Lady Bankes (née Hawtry; c. 1598 – 11 April 1661) was a Royalist who defended Corfe Castle from a three-year siege during the English Civil War from 1643 to 1645.

She was married to Sir John Bankes, Lord Chief Justice of the Common Pleas and Attorney-General of King Charles I.

In 1635, Sir John purchased Corfe Castle in Dorset with all its manors, rights, and privileges from Lady Elizabeth Coke.

Mary and her small group defended the Upper Ward and by heaving stones and hot embers from the battlements, managed to repel the assailants, killing and wounding over 100 men in August.

On the south wall of the chancel inside the church there is a monument to Mary with this inscription: To the memory of Mary, Lady Bankes, the only daughter of Ralph Hawtery, of Riselip, in the county of Middlesex, esq., the wife and widow of Sir John Bankes, knight, late Lord Chief Justice of His Majesty's court of Common Pleas, and of the Privy Council of His Majesty King Charles I of blessed memory, who having had the honour to have borne with a constancy and courage above her sex, a noble proportion of the late calamities, and the restitution of the government, with great peace of mind laid down her most desired life the 11th day of April 1661.