Jean-Simon Desgagnés (born 26 July 1998) is a Canadian track and field athlete who specializes in the 3000 metres steeplechase.

[1] Desgagnés made his international debut for Canada competing in the U20 race at the 2017 IAAF World Cross Country Championships in Kampala, Uganada.

In March 2018, Jean-Simon competed at his first USPORTS Track and Field Championships representing the Laval Rouge et Or.

In July, he won a bronze medal in the steeplechase at the 2019 Summer Universade and placed fourth at the Canadian Championships in Montreal.

[2] On May 21, 2021, Jean-Simon opened his season with a 8:29.41 steeple PB to win the Trials of Miles in New York City.

At the Canadian Championships in Langley, British Columbia, he place third behind John Gay and Ryan Smeeton.

He set a new personal best 3000 m steeplechase time of 8:20.68 in May 2023, at the Sound Running Track Festival in Walnut, California.

[5] He competed in the 3000 metres steeplechase at the 2023 World Athletics Championships in Budapest in August 2023, where he qualified for the final.