Frances Cecil, Countess of Exeter (2 December 1630 – 2 December 1669), formerly Lady Frances Manners, was the first wife of John Cecil, 4th Earl of Exeter. She was a daughter of John Manners, 8th Earl of Rutland, and his wife, . The Countess of Exeter's sisters, Margaret, Elizabeth and Dorothy, all became countesses. Another, , became a Viscountess. She married the earl on 8 December 1646. Two of their children survived infancy: * John Cecil, 5th Earl of Exeter (c. 1648–1700) * Lady Frances Cecil (1652–1694), married John Scudamore, 2nd Viscount Scudamore.