Mario Aoun (born 1951) is a Lebanese physician and politician. He was a member of the Free Patriotic Movement (FPM) led by Michel Aoun. He was the minister of social affairs between 2008 and 2009.

Aoun was born into a Maronite family in Damour in 1951.^[1][2] He is a graduate of the University of Bordeaux and received a medical degree in endocrinology and metabolic illnesses in 1982.^[1]

Aoun was the chief of service at Lebanese Hospital in Jeitawi in 2004.^[1] He also worked at St. Charles Hospital in 2004.^[1] In addition, he was FPM’s coordinator in Damour.^[1] Later he became the first FPM head of the Lebanese Order of Physicians on 31 May 2004.^[3] He served there until 2007. In July 2008, Aoun was appointed minister of social affairs to the cabinet led by Prime Minister Fouad Siniora and replaced Nayla Mouawad in the post.^[4] Aoun ran for a seat from the Chouf district in the general elections of 2009, but he could not win the election.^[5] Aoun's tenure as social affairs minister ended in November 2009, and he was succeeded by Salim Sayegh in the aforementioned post.^[6]

In the 2018 elections Aoun won one of the Maronite seats in the Chouf District within the electoral district of Mount Lebanon IV.^[7] On 10 September 2022, he resigned from the FPM because of his clash with Gebran Bassil.^[8]