John Callaghan
# John Callaghan

John Callaghan may refer to:

* John Callaghan (physician) (1923–2004), Canadian cardiac surgeon
* John Callaghan (Galway), Irish murder victim
* John Callaghan (musician) (born 1969), British musician
* John Callaghan (screenwriter), see List of Republic of Doyle episodes
* John Callaghan (footballer), see List of Sheffield Wednesday F.C. players
