Margaret Stuart (or Stewart) (c. 1591 – 4 August 1639) was the daughter of James Stewart, 2nd Earl of Moray, and Elizabeth Stuart, 2nd Countess of Moray.
In September 1603, she married Charles Howard, 1st Earl of Nottingham. They had two children:
After her first husband's death, in 1625, she married William Monson, 1st Viscount Monson. They had no children.