Peter Sullivan may refer to:
- Peter Sullivan (actor) (born 1963), British actor
- Peter Sullivan (designer) (1932–1996), British graphic designer, The Sunday Times
- Peter Sullivan (ice hockey) (born 1951), Canadian hockey player
- Peter Sullivan (politician) (born 1967), from Manchester, New Hampshire
- Peter Sullivan (record producer), record producer of the 1960s
- Peter Sullivan (rugby, born 1948), Australian rugby league player and rugby union international captain
- Peter Sullivan (rugby union, born 1998), Irish rugby union player
- Peter Sullivan (screenwriter) (born 1976), American screenwriter, film director and producer
- Peter John Sullivan (1821–1883), American soldier and diplomat