Oussama Al Rahbani (Arabic: أسامة الرحباني; born 9 December 1965) is a Lebanese musician and composer.

In 1986, he founded the Jazz Gate band and performed at the 1987 Byblos International Festival and in 1989 at Casino du Liban.

In 2001, he took part as composer and conductor in the musical play Abou Tayeb al Mutanabi by Mansour Rahbani and produced a Russian night concert in Lebanon with St. Petersburg Philharmonic Orchestra conducted by Nicolai Alexyev.

Between 2004 and 2007, he was a consultant in the reality TV show Star Academy produced by LBC, giving musical culture lessons to the aspiring contestants.

In 2007, he composed for Zenobia, a musical play Mansour Rahbani followed by The Return of the Phoenix, performed at the Byblos International Festival, at Casino du Liban and in Dubai.

[2] He also composed the musical play Don Quixote by Marwan and Ghadi Rahbani, performed at Byblos International Festival.

He also took part in Ehdeniyat Festival and the Palais des Congrès Lebanon with Hiba Tawaji and Wadih Abi Raad.