Stefan Wittwer (born 26 March 1971) is a Swiss nordic combined skier who competed in 1995 and 1996. He won a bronze medal in the 4 x 5 km team event at the 1995 FIS Nordic World Ski Championships in Thunder Bay, Ontario.
Wittwer's best individual finish was 2nd in the 15 km individual in Oberhof, Germany in 1996.