Raja Hasan Sagar (born 25 December 1982) is an Indian playback singer from Bikaner, Rajasthan.

[2] He was a finalist on Sa Re Ga Ma Pa Challenge 2007, in which he finished as runner-up to Aneek Dhar.

He considers his father, Rafik Sagar (singer and music composer) and his grandfather Allah Rakha Khan as his gurus in singing.

[7] Raja Hasan was a runner-up in the reality TV show Sa Re Ga Ma Pa Challenge 2007 and winner of Ek Se Badhkar Ek on Zee TV, Music Ka Maha Muqqabla on StarPlus, Ustaadon Ka Ustaad on Sony and, IPL Rockstar[8] on the Colors channel.

He and Arijit Singh Debuted Together in Aaja Nachle[9] Song in High School Musical 2.