Maharaja Sir Tej Singh Prabhakar, KCSI (17 March 1911 – 15 February 2009), was a ruler of Naruka dynasty of the Indian princely state of Alwar, Rajasthan from July 22, 1937 to 15 August 1947.
After 1948, Sir Tej retired to his New Delhi residence, Alwar House, where he lived for the next six decades, visiting his former kingdom but rarely.
Sir Tej Singh Bahadur was formally dispossessed of his titles in 1971 as part of the mass derecognition drive of the royal families' status.
Sir Tej Singh passed away at his Alwar House, New Delhi residence, on 15 February 2009, a month away from his 98th birthday.
He was succeeded as Maharaja of Alwar by his grandson, Jitendra Singh, though the title no longer comes with any authority or power.