Peter Martyn

Peter Martyn may refer to:
 * Peter Martyn (soldier) (1772–1827), Irish soldier
 * Peter Martyn (actor) (1925–1955), British actor
 * Peter Martyn (judge), Irish barrister, landowner and judge
 * Peter Martyn (MP), Member of Parliament (MP) for Helston
 * Peter H. Martyn (born 1948), Canadian journalist