Mitra is from Belonia, South Tripura District, Tripura. He is the son of late Ramesh Chandra Mitra. He completed his B.Ed. in 1981 at Government B.Ed. College, Agartala, which is affiliated with University of Calcutta, West Bengal. Earlier, he did his B.Sc. at Maharaja Bir Bikram College, Agartala also under University of Calcutta in 1969. He is a retired government teacher.[5]