George Montagu, 4th Duke of Manchester PC (6 April 1737 – 2 September 1788) was a British politician and diplomat.
Manchester was the son of Robert Montagu, 3rd Duke of Manchester.
He was Member of Parliament for Huntingdonshire 1761–1762. In 1782, he was appointed a Privy Counsellor. He signed the Peace of Paris (1783).
He married Elizabeth Dashwood, daughter of Sir James Dashwood, 2nd Baronet on 22 October 1762. They had several children, including:
George Montagu, Viscount Mandeville (1763–1772)
Caroline Maria Montagu (d. 1847), married James Graham, 3rd Duke of Montrose and had issue.
William Montagu, 5th Duke of Manchester (1771–1843)
Lord Frederick Montagu (1774–1827)
Styles of address
- 1737-1739: Mr George Montagu
- 1739-1761: Viscount Mandeville
- 1761-1762: Viscount Mandeville MP
- 1762-1782: His Grace The Duke of Manchester
- 1782-1788: His Grace The Duke of Manchester PC