Peter Piper is a nursery rhyme.
Peter Piper may also refer to: Peter Piper (Royal Navy officer) (1913–1995), officer in the Royal Naval Reserve in the Second World War "Peter Piper" (song), a song by Run-DMC Peter Piper Pizza, an Arizona-based pizza chain Peter Piper, a character in the 1932 film After Tomorrow Peter Piper Principle, when people confuse words that start with the same letter