Gustav "Bib" Wagner (April 26, 1901 – January 11, 1972) was a Luxembourgian bobsledder who competed in the 1930s. He competed in the two-man event at the 1936 Winter Olympics, but crashed out during the fourth run and did not finish. Wagner was born in Luxembourg City.

• 1936 bobsleigh two-man results
• 1936 Olympic Winter Games official report.(in German) - p. 419.
• COSL-ALO profile (in French)
• Gustav Wagner's profile at Sports Reference.com