John Manners, 5th Duke of Rutland

His Grace The Duke of Rutland KG
The Duke of Rutland.
Lord-Lieutenant of Leicestershire
In office 1799–1857
Preceded by	The Duke of Beaufort
Succeeded by	The Duke of Rutland
Personal details
Born	4 January 1778 Knightsbridge, London
Died	20 January 1857 (1857-01-21) (aged 79) Belvoir Castle, Leicestershire
Nationality	British
Spouse(s)	Lady Elizabeth Howard (1780–1825)

John Henry Manners, 5th Duke of Rutland KG (4 January 1778 – 20 January 1857), styled Lord Roos from 1778 until 1779 and Marquess of Granby from 1779 until 1787, was a British landowner as well as an owner and breeder of Thoroughbred racehorses.

Styled Lord Roos from birth, he was born at Knightsbridge, London, the eldest son of Charles Manners, 4th Duke of Rutland, by Lady Mary Isabella Somerset, daughter of Charles Somerset, 4th Duke of Beaufort. He was the grandson of John Manners, Marquess of Granby, and the brother of Lord Charles Manners and Lord Robert Manners. He became known as the Marquess of Granby when his father succeeded to the dukedom in 1779. In 1787 he himself succeeded to the dukedom on the death of his father.

Rutland was Lord Lieutenant of Leicestershire between 1799 and 1857. He was also a prominent owner and breeder of Thoroughbred racehorses. His most successful horse was Cadland, which won the Epsom Derby in 1828.

Rutland married Lady Elizabeth Howard, daughter of Frederick Howard, 5th Earl of Carlisle, on 22 April 1799.

They had ten children:

The Duchess oversaw landscaping works at Belvoir Castle grounds and took an active interest in managing the estate, including designing a model farm. She also made improvements to Cheveley Park and oversaw the building works at York House on the Mall for the Duke of York. She was also credited with designing a new palace for George IV.