Grace, Lady Manners was an English noblewoman who lived at Haddon Hall near Bakewell, Derbyshire. She founded Lady Manners School in 1636.
Grace Pierrepont was the daughter of Sir Henry Pierrepont, a Knight of the Garter, and Frances Cavendish. Her maternal grandparents were Rt. Hon. Sir William Cavendish and Bess of Hardwick. Grace's brother was Robert Pierrepont, born in 1584, who became the 1st Earl of Kingston-upon-Hull. Grace's sister, Elizabeth, married Thomas Erskine, 1st Earl of Kellie.
Grace was married to Sir George Manners on 1 August 1593. She had four children including John Manners, 8th Earl of Rutland.
On 20 May 1636, she founded Lady Manners School.
Her body is interred in Bakewell Parish Church.