Cynthia Mathez (born 10 October 1985) is a Swiss para-badminton player who competes in the WH1 category.

Mathez is part of the Swiss national para-badminton team and won gold at the European Para Badminton Championships with her doubles partner Ilaria Renggli in Rotherdam in 2023.

[1][2] In 2017, Mathez first took part in a BWF Para-Badminton World Championships in Ulsan and reached the quarter-finals in doubles with Karin Suter-Erath.

In 2018, she was successful at the European Championships in Rodez and won gold in doubles with Karin Suter-Erath, while in singles, she was eliminated in the quarter-finals.

At the 2019 World Championship in Basel, she was eliminated in the women's and mixed doubles in the group stage.