Elizabeth Percy, Countess of Northumberland

Elizabeth Percy, Countess of Northumberland (; 1646 – 19 September 1690), was a British courtier. She was one of the Windsor Beauties, painted by Sir Peter Lely.

Origins She was a daughter of Thomas Wriothesley, 4th Earl of Southampton (1607–1667) by his wife Lady Elizabeth Leigh, daughter of Francis Leigh, 1st Earl of Chichester.

Marriages and progeny She married twice: Firstly on 23 December 1662 she married Joceline Percy, 11th Earl of Northumberland (1644–1670), by whom she had two children: John Montagu, 2nd Duke of Montagu (c.1690 – 5 July 1749). Anne Montagu, wife of Alexander Popham.

In the course of her marriage to Montagu, he inherited his father's barony and later acquired the title "Earl Montagu", making Elizabeth once more a countess. However, it was only after her death that he was created 1st Duke of Montagu.

Windsor Beauty Elizabeth was an important patron of the artist Sir Peter Lely (1618–1680), who painted her several times. Her portraits were among the Windsor Beauties at Hampton Court and among the series of beautiful women portraits, ordered by Cosimo III de' Medici, Grand Duke of Tuscany.