Mario Stefel (born 8 February 1996) is an Austrian footballer who plays for Liechtensteiner club USV Eschen/Mauren.
On 9 July 2019 SV Horn confirmed, that they had signed Stefel from SC Wiener Neustadt.
On 10 July 2020 he signed with SC Rheindorf Altach.
On 31 January 2022, Stefel joined Dornbirn until the end of the season.