John Cronin may refer to: John Cronin (horticulturist) (1865–1923), director of the Royal Botanic Gardens, Melbourne John Cronin (New Zealand politician), currently the chairperson of the Bay of Plenty's regional council John Cronin (British politician) (1916–1986), British surgeon and Labour Party politician John Cronin (convict) (born 1971), repeat-offence Scottish convict who become the first convict to be tracked by satellite in the UK John Francis Cronin (1908–1994), priest, author of Communism: a World Menace John Cronin (Massachusetts politician), US politician John Cronin (ice hockey) (born 1980), former US hockey player John Cronin (Gaelic footballer) (1923–1992), Irish Gaelic footballer