Otto Neumüller (Altenfelden, 9 November 1908; date of death unknown) was an Austrian sprint canoeist who competed in the late 1930s. He won a gold medal in the C-1 1000 m event at the 1938 ICF Canoe Sprint World Championships in Vaxholm, Sweden.
Neumüller also competed at the 1936 Summer Olympics in Berlin, finishing fourth in the C-1 1000 m event.