George Montagu, 4th Duke of Manchester PC (6 April 17372 September 1788) was a British politician and diplomat.
Early life
He was the son of Robert Montagu, 3rd Duke of Manchester and the former Harriet Dunch. Among his siblings were Lord Charles Montagu (who married Elizabeth Bulmer) and Lady Caroline Montagu (wife of Charles Herbert, grandson of Thomas Herbert, 8th Earl of Pembroke).
He served as Collector of Subsidies in the Port of London in 1762 and was Lord of the Bedchamber from 1762 to 1770, resigning his position after the fall of the Grafton ministry in January and went into opposition. Also in 1782, he was appointed a Privy Councillor. In 1783, he was appointed Ambassador to France to "supervise the conclusion of treaty negotiations between Great Britain and France, Spain, and the Netherlands."
thumb|upright|Portrait of Manchester by [[Anton Raphael Mengs]]
Manchester was Lord Lieutenant of Huntingdonshire from 1762 until his death in 1788. He was also Grand Master of the Freemasons from 1777 to 1782 when he was succeeded by Prince Henry, Duke of Cumberland and Strathearn.
- George Montagu, Viscount Mandeville (1763–1772), who died in childhood.