Josef "Joschi" Weidinger (25 April 1923 – 26 June 2002), better known as Jo Weidin, was an Austrian boxer who won the European Boxing Union heavyweight title in 1950.

Born in Vienna, Weidin made his professional debut in December 1945 with a third-round knockout of Stefan Schmidt.

[2] In 1947 he beat Jan Declercq, Enrico Bertola, Stephane Olek, and Robert Eugene to win a European heavyweight tournament (with no title at stake).

[3][4] Back in Austria he won his next three fights, including a second-round stoppage of Heinz Lazek in September 1949.

[2] He went on to act as president of the local professional boxing association and as a board member of SK Rapid Wien.