Jonas Geens (born 4 January 1999) is a Belgian cyclist, who currently rides UCI WorldTeam Alpecin–Premier Tech.

Geens came to cycling relatively late, he initially took part in athletics, but he abandoned the sport due to persistent injuries. He started cycling in 2022 with the Van Mossel Heist Cycling Team, before signing with UCI Continental team Tarteletto–Isorex in 2023. With the team, he took the overall victory in the Tour de la Mirabelle in May 2023.

In 2025, he signed with UCI ProTeam Team Flanders–Baloise after having a successful 2024 season on the French amateur circuit. The following season he UCI WorldTeam Alpecin–Premier Tech after having placed in the top 10 of the 2025 Tour of Norway and Région Pays de la Loire Tour.