Thomas, Tom or Tommy Callaghan may refer to:
Tommy Callaghan (footballer, born 1886) (1886–1917), English footballer Tom Callaghan (active 1925–33), Scottish footballer who played for Scottish, Irish and English Football Leagues Thomas Patrick Callaghan (born 1938), Irish long-distance runner Tommy Callaghan (1945–2024), Scottish footballer who played for Celtic, Dunfermline Athletic, and Clydebank Thomas Callaghan (judge) (1815–1863), Australian judge of the District Court of New South Wales Thomas Callaghan, an alias of burglar and author Jack Black (1871–1932)
See also Thomas O'Callaghan (1845–1931), Australian police officer Tom Callahan (1921–1996), American basketball player