John Callaghan (disambiguation)

John Callaghan was a cardiac surgeon.

John Callaghan may also refer to:

• John Callaghan (Galway)
• John Callaghan (musician), see WarpVision
• John Callaghan (screenwriter), see List of Republic of Doyle episodes
• John Callaghan (footballer), see List of Sheffield Wednesday F.C. players

See also

• John Callahan (disambiguation)
• John O'Callaghan (disambiguation)