Ilionis Guillaume (born 13 January 1998) is a French track and field athlete who is a twice national indoor champion in the triple jump.

The following year, she won the French Athletics Indoor Championships in the triple jump, with a 14.07m new personal best in February 2018.

[5] She won another national title at the 2023 French Indoor Athletics Championships in Aubiere.

[7] She competed for France at the 2024 World Athletics Indoor Championships in Glasgow[8] where she came in 8th with a distance of 14.01m.

[9] She won bronze at the 2024 European Athletics Championships in Rome, winning the medal with her final jump, a personal best distance of 14.43 metres.