Mathias Flückiger (born 27 September 1988) is a Swiss mountain bike racer. He rode at the cross-country event at the 2016 Summer Olympics, and 2020 Summer Olympics, where he won a silver medal. His brother Lukas is also a cyclist. In June 2022, he tested positive for zeranol during the Swiss national championships, which he won. He was temporarily suspended on 19 August 2022. He appealed the decision, and in December, his suspension was lifted.