Pfaff is a surname. Notable people with the surname include:
Alfred Pfaff, German football playerAnita Bose Pfaff, economistChris Pfaff, American television actorDebby Pfaff, reality show personalityDieter Pfaff (1947–2013), German actorEva Pfaff, German tennis playerFerenc Pfaff, Hungarian architectGeorg Michael Pfaff, German manufacturer of sewing machines (See the article in German Wikipedia)Jean-Marie Pfaff, Belgian football playerJohann Friedrich Pfaff, German mathematicianConcepts named after him include the Pfaffian, Pfaffian functions, and the Pfaff problem29491 Pfaff, a main-belt asteroid named in his honourKristen Pfaff, American musicianLyndsey Pfaff, reality show personalityPetra Pfaff, East German hurdlerWilliam Pfaff, American authorJudy Pfaff, artist