Birth: , Bikaner, Rajasthan, India.
Rajan Hasan is an Indian playback singer. He was a finalist on Sa Re Ga Ma Pa Challenge 2007, who was the 1st runner up in the competition attaining 3,52,40,963 votes in the final, losing to Aneek Dhar.

Raja Hasan, comes from the desert city of Bikaner in Rajasthan. He considers his father Rafik Sagar and his grand father Allah Rakha Khan, his Gurus in singing. His family belongs to the royal singers of the Jodhpur State, thus singing comes naturally to Raja and he has brought this legacy to the international arena.

Raja entered the Bollywood fraternity with help from the musical duo Vishal-Shekhar, with the smash hit song 'Maari Teetri' in the movie 'De Taali'. Post that, he went on to sing songs like 'Maula Maula Mere Maula' from the movie 'Dostana', 'Dhun lagi' from the movie 'Jai-veeru', 'Delhi destiny' from '99', 'Wallah Re Wallah' from 'Tees Maar Khan' picturised on Salman Khan & Akshay Kumar, 'Aali re Aali re' from 'No One Killed Jessica' for music director Amit Trivedi.

He is one of the best performers when it comes to stage shows for corporate events or wedding parties. He is one of the hot favorite singers when it comes to Marwari get-togethers because of his ability to sing famous Marwari songs. He has performed all across the globe.