Henry George Percy, 7th Duke of Northumberland (29 May 1846–14 May 1918) was a British politician.

Percy's political career began in 1868, when he was elected MP for Northumberland North . He was appointed to the Privy Council in 1874, and he left the House in 1885. He inherited his father's peerages in 1899 upon the latter's death; that same year, he became a Knight of the Garter. He served as Lord Lieutenant of Northumberland from 1904 until his death in 1918. He was Lord High Steward at King George V's coronation in 1911.