Rupert Weinstabl (November 20, 1911 – September 7, 1953) was an Austrian sprint canoeist who competed in the 1930s.
At the 1936 Summer Olympics in Berlin, he won two medals with his partner Karl Proisl with a silver in the C-2 1000 m and a bronze in the C-2 10000 m events.
Weinstabl also won two medals at the 1938 ICF Canoe Sprint World Championships in Vaxholm with a gold in the C-2 1000 m and silver in the C-2 10000 m events.
He competed for Germany because it had annexed Austria at the time of the championships.