Gustav Wegner (4 January 1903 – 7 June 1942) was a German track and field athlete who competed in the pole vault and the decathlon.

He graduated in 1927 from the Prussian Academy for Physical Education (German: Preussischen Hochschule für Leibesübungen) and trained in gymnastics, swimming and rowing.

[1] Wegner's first and only major medal at an international tournament came at the inaugural 1934 European Athletics Championships, which was held in Turin.

Germany's sole entrant in the event, he cleared four metres to defeat Sweden's Bo Ljungberg on count-back and become the first ever European champion in the pole vault.

[3] He competed simultaneously in the pole vault and decathlon and although he never won a championship title in his secondary discipline, he ranked within the top-20 decathletes in the world five times during the period from 1926 to 1932.