Stefan Bromberger (born 29 March 1982) is a German chess Grandmaster (GM). He was awarded the title of International Master (IM) in 1999 and the GM title in June 2009 by FIDE, the international chess federation. Bromberger has played several seasons in the German Chess Bundesliga, representing clubs such as SVg Plettenberg and SC Stadthagen.
Bromberger became the Bavarian U18 champion in 1999 and the German U20 champion in 2001. He also came second in the 2007 German Chess Championships. He has competed in multiple European Men's Team Chess Championship and World Team Chess Championship events, representing Germany, with his highest score of 5/9 in the 2005 European Men's Team Chess Championship.
Bromberger studied mathematics at the University of Stuttgart and later worked as a research assistant at the University of Konstanz.