John Kirwan

John Kirwan may refer to:
 * John Óge Kirwan (fl. 1530–1531), mayor of Galway
 * Sir John Kirwan (1650–1721), Irish entrepreneur
 * John Kirwan (cricketer) (1816–1899), English cricketer
 * John Kirwan (politician) (1869–1949), Australian politician
 * John William Kirwan (died 1849), president of Queen's College, Galway
 * Jack Kirwan (John Henry Kirwan) (1878–1959), Irish international footballer player who played for Everton, Tottenham and Chelsea
 * Jack Kirwan (rugby league) (1896–1968), New Zealand rugby league player
 * Sir John Kirwan (rugby) (born 1964), New Zealand rugby player and coach, and mental health advocate