George Percy, 5th Duke of Northumberland PC (22 June 1778 – 22 August 1867), styled Lord Lovaine between 1790 and 1830 and known as the Earl of Beverley between 1830 and 1865, was a British Tory politician. He served as Captain of the Yeomen of the Guard under Sir Robert Peel between 1842 and 1846. He succeeded to his peerage on 12 February 1865, after the death of his childless cousin Algernon Percy.
Northumberland was returned to parliament for the rotten borough of Bere Alston in 1799, a seat he held until 1830, when he succeeded his father in the earldom and entered the House of Lords. From 1804, he served as a Lord of the Treasury for the next two years. He was sworn of the Privy Council in January 1842 and was appointed Captain of the Yeomen of the Guard (Deputy Chief Whip in the House of Lords) by Sir Robert Peel, a post he held until the government fell in 1846. In February 1865, at the age of 86, he succeeded his cousin as fifth Duke of Northumberland.
Northumberland was also a president of the Royal National Lifeboat Institution.