John Hanna

John Hanna may refer to:


 * John Hanna (ice hockey) (1935–2005), Montreal Canadiens hockey player
 * John Clark Hanna, founder of the original ELF
 * John A. Hanna (1762–1805), United States Representative from Pennsylvania
 * John Hanna (Indiana politician) (1827–1882), United States Representative from Indiana
 * John Hanna (baseball) (1863–1930), 19th century major league baseball catcher
 * John G. Hanna (1889–1948), sailboat designer
 * John William Hanna (1889–1962), Canadian merchant and politician
 * John Hanna (prison officer) (c. 1947–1992), Northern Irish prison officer convicted of helping the IRA murder a colleague
 * John Hanna (rower), British rower
 * Jack Hanna (born 1947), American zookeeper