Peter Davis may refer to:
- Peter Hadland Davis (1918–1992), British botanist
- Peter George Davis (1923–2011), British Special Boat Service officer
- Peter G. Davis (1936–2021), American opera critic and scholar
- Peter Davis (director) (born 1937), American news writer and documentary filmmaker
- Sir Peter Davis (businessman) (born 1941), British businessman
- Peter Davis (sociologist) (born 1947), professor of sociology and husband of former New Zealand Prime Minister Helen Clark
- Peter Davis (theater historian), professor at the University of Illinois
- Peter Lovell-Davis, Baron Lovell-Davis (1924–2001), British publishing executive and Labour Party politician
- Peter Davis (musician) (1887-1971), New Orleans musician and teacher