Pfeffer is a German surname meaning "pepper" and may refer to:
Anna Pfeffer (born 1946), Hungarian Olympic medalist sprint canoer
Anton Pfeffer (born 1965), Austrian footballer
Franz Pfeffer von Salomon (1888-1968), first commander of the SA
Fred Pfeffer (1860-1932), American baseball player
Fritz Pfeffer (1889-1944), Nazi victim
Georg Johann Pfeffer (1854-1931), German zoologist
Johann Pfeffer, German sculptor of the 17th century, working primarily in Poland
Jeffrey Pfeffer, Thomas D. Dee II Professor of Organizational Behavior
Leo Pfeffer, (1910-1993), American legal scholar
Washek Pfeffer (born 1936), Czech/US mathematician
Wilhelm Pfeffer (1845-1920), German botanist
Ronnie Pfeffer (born 1992), Professional Football Player in the Canadian Football League