Mary Villiers, Countess of Buckingham (née Beaumont; c. 1570 – 19 April 1632) is perhaps best known as the mother of the royal favourite Sir George Villiers, 1st Duke of Buckingham. She was the daughter of Anthony Beaumont of Glenfield, Leicestershire, a direct descendant of Henry de Beaumont, and his wife Anne Armstrong, daughter of Thomas Armstrong of Corby.