Stephanie Mariel Petit (born 25 August 1996) is an Argentine former tennis player.

[1][2] Petit has a career-high a singles ranking by the Women's Tennis Association (WTA) of 525, achieved on 12 February 2018.

She also has a career-high WTA doubles ranking of 559, achieved on 26 February 2018.

Petit made her Fed Cup debut for Argentina in 2018.

[3][4] This biographical article relating to Argentine tennis is a stub.