Prince John may refer to:John, King of England (1166–1216) known as Prince John during the reigns of his father and older brother
Prince John of the United Kingdom (1905–1919), youngest son of King George V
John of Eltham, Earl of Cornwall (1316–1336), second son of Edward II
John of Gaunt, 1st Duke of Lancaster (1340-1399), third son of Edward III
John of Lancaster, 1st Duke of Bedford (1389–1435), second son of Henry IV
John, Prince of Asturias, (1478–1497), only son of Ferdinand II of Aragon and Isabella I of Castile
Prince Alexander John of Wales (1871), third son and youngest child of Edward VII
Prince John Konstantinovich of Russia (1886–1918), great-grandson of Nicholas I of Russia
Prince John August of Saxe-Gotha-Altenburg (1704–1767), son of Frederick II, Duke of Saxe-Gotha-Altenburg