Interloper, Interlopers or The Interlopers may refer to:

• Interloper (album), by Carbon Based Lifeforms
• Interloper (asteroid), a nominal, but not true member of an asteroid family
• Interloper (comics), a fictional character in the Marvel Comics universe
• Interloper Films, a production company
• Interlopers, a 2001 science fiction novel by Alan Dean Foster
• The Interloper, a 1918 American drama film directed by Oscar Apfel
• The Interlopers (novel), a Matt Helm spy novel by Donald Hamilton
• "The Interlopers", a short story by Saki

• John Phillips (writer)
• John Phillips (zoologist)
• John Philp Thompson Sr.
• John Phin
• John P. Holdren
• John Pibush
• John Picard
• John Picard (musician)
• John Pickard (disambiguation)
• John Pickel
• John Picken
• John Pickering
• John Pickering (disambiguation)
• John Pickering (dramatist)
• John Pickering (footballer born 1944)
• John Pickering (football manager)
• John Pickering (judge)
• John Pickering (playwright)
• John Pickering Putnam
• John Pickering (soldier)
• John Pickersgill Rodger
• John Pickett
• John Pickett (baseball)
• John Pickett (canoeist)
• John Pickett (disambiguation)