Peter Gallagher (disambiguation)
Peter Gallagher is an American actor.
Peter Gallagher may also refer to:
- Peter Gallagher (comic strip artist), current writer of Heathcliff
- Peter Gallagher (rugby league, born 1937), Australian rugby league footballer of the 1950s and 1960s who played in Queensland and represented Australia
- Peter Gallagher (rugby league, born 1941), Australian rugby league footballer of the 1960s who played in New South Wales for Easts and Manly
- Peter Gallagher (American football), American college football coach
- Peter T. Gallagher, Irish astrophysicist