Major General Sir John Samuel Jocelyn Percy, KBE, CB, CMG, DSO (9 March 1871 – 25 August 1952) was a British Army officer and Inspector General of the Royal Albanian Gendarmerie.
He returned to England in 1884, and was educated at Queen Elizabeth's Grammar School in Sevenoaks and the Royal Military College, Sandhurst.
After service in Ireland, Percy was posted to India and served in the 1894 Waziristan campaign and the 1895 Chitral Expedition.
During the First World War, Percy served in a number of staff positions, with the 27th, 48th, and 31st Divisions.
Later, he was on the staff of the 11th Corps, the Fifth Army under General Sir Hubert Gough, and the Second Army under General Sir Herbert Plumer.