Frank Hemmer (born 28 April 1963, in Hagen-Hohenlimburg) is a West German-German slalom canoeist who competed from the mid-1980s to the early 1990s. He won a gold medal for West Germany in the C2 event at the 1989 ICF Canoe Slalom World Championships in Savage River, Maryland in the United States. He also won three bronze medals at the ICF Canoe Slalom World Championships in the C2 team event (1987, 1989, 1991).