M. R. Radhakrishnan married four times, and his marriages were concurrent. The names of his wives were Smt. Saraswathi Ammal, Smt. Dhanalakshmi Ammal, Smt. Jayammal and Smt. Geetha. He was survived by three of his wives, namely Smt. Saraswathi Ammal, Smt. Dhanalakshmi Ammal and Smt. Jayamamal.