Yannick Wilhelmi (born 12 October 2000) is a Swiss professional squash player. He reached a career high ranking of 50 in the world during December 2024.
In December 2023, Wilhelmi won a bronze medal with Switzerland, at the 2023 Men's World Team Squash Championships in New Zealand.
After a first round exit from the 2024 PSA Men's World Squash Championship in May, he won his 6th PSA title after securing victory in the PSA des Hauts-de-France during the 2024–25 PSA Squash Tour.
Wilhelmi won another bronze medal with Switzerland, at the December 2024 Men's World Team Squash Championships in Hong Kong.