Morley Callaghan - Canadian novelist, short story writer, playwright, TV and radio personality.

James Callaghan - Prime Minister of the United Kingdom (1976-79)

USS Callaghan (DDG-994)

Sheila Callaghan - American playwright

J. Christopher Callaghan - 2006 Republican Candidate for NY State Comptroller

Daniel Judson Callaghan - Rear Admiral - US Navy

Aaron Callaghan - current assistant manager and former manager for the Irish (Republic) football (soccer) club Longford Town.

Callaghan, an Irish surname, can refer to:

Callaghan, New South Wales, a suburb of Newcastle, New South Wales and home of the University of Newcastle, Australia