Landgraf is a surname. Notable people with the surname include:
Alberto Landgraf (born 1980), Brazilian chef Arne Landgraf (born 1977), German rower Brooks Landgraf (born 1981), American politician Bruno Landgraf das Neves (born 1986), Brazilian athlete Dennis Landgraf (born 2001), German politician Franz Landgraf (1888–1944), German general John Landgraf (born 1962), American television executive Günther Landgraf (1928-2006), German physicist Kapulani Landgraf (born 1966), American artist Katharina Landgraf (born 1954), German politician Ken Landgraf (born 1950), American comic book illustrator Lois Landgraf, American politician Manuela Landgraf, German pair skater Niklas Landgraf (born 1996), German footballer Sigrid Landgraf (born 1969), German field hockey player Stanley I. Landgraf (1925–1997), American businessman Steffen Landgraf (born 1980), German athlete Werner Landgraf (born 1959), German astrophysicist Willi Landgraf (born 1968), German footballer
The German noble title Landgraf is Landgrave in English.