Margaret Wotton, Marchioness of Dorset (1485 – 6 October 1535) was the second wife of Thomas Grey, 2nd Marquess of Dorset, and the mother of his children, including Henry Grey, 1st Duke of Suffolk, with whom she engaged in many quarrels during his minority over money and his allowance. Her lack of generosity to Henry shocked her peers as unmotherly, and inappropriate behaviour toward a high-ranking nobleman, relative of King Henry VIII of England. In 1534, she was compelled to answer to the charges that she was an "unnatural mother".