Stéphanie Mary Groß (born 12 October 1974 in Basel, Switzerland) is a retired amateur German freestyle wrestler, who competed in the women's middleweight category.

Before her sporting career ended in 2008, Gross trained full-time as a member of the wrestling squad for AC Ückerath in Dormagen, North Rhine-Westphalia, under her father and personal coach Walter Groß.

[4][5] She lost her opening match 1–4 to the host nation's Stavroula Zygouri by the massive clamor of the home crowd inside Ano Liossa Olympic Hall, but rallied for a three-point victory by beating Sweden's Sara Eriksson in her second bout to close the prelim pool.

Despite missing a spot for the semifinals, Gross seized an opportunity to face against Canadian wrestler and 2003 world bronze medalist Viola Yanik in the consolation round, but she could not score enough points to push her opponent off the mat, and lost the match 1–4, placing only seventh in the final standings.

[6] At the 2007 World Wrestling Championships in Baku, Azerbaijan, Gross fell short of a chance to take her first ever trophy after losing out to Frenchwoman Audrey Prieto with a 2–10 decision, but guaranteed to cease her nine-year medal drought with a silver.