Otto Neumüller (born November 9, 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.