Leila Maryam Ben Youssef (Arabic: ليلى مريم بن يوسف; born November 13, 1981, in Sidney, Montana, United States) is a Tunisian-American pole vaulter.

Born in Sidney, Montana, to a Tunisian father and a French mother, Ben Youssef started out her athletic career in pole vault at the age of fourteen.

She excelled at her sport and academics throughout her years at Sidney High School, where she became a three-time Class A state champion, and posted a personal record of 12 feet and 7.5 inches (3.84 metres).

[1] Since graduating from Stanford University in 2005, Ben Youssef continued to compete for pole vault this time, as a member of the Tunisian national track and field team.

[3][4] The following year, Ben Youssef improved her performance at the African Championships in Addis Ababa, Ethiopia, when she cleared 4.00 metres to clinch another career gold medal.