Franz Pfeiffer may refer to:
Franz Pfeiffer (literary scholar) (1815–1868), Swiss literary scholar Franz Pfeiffer (physicist) (born 1972), German physicist Franz Pfeiffer (officer), German Wehrmacht officer Franz Georg Pfeiffer (1784–1856), German legal scholar and politician
See also Franz Pfeffer von Salomon (1888–1968), or Franz von Pfeffer, Nazi leader