Mu. Varadarajan (Tamil: மு. வரதராசன் b. 25 April 1912 - d. 10 October 1974), also known as Mu. Va. and Varatharasanar, was a Tamil scholar, author and academic from Tamil Nadu, India. He was a prolific writer whose published works include 13 novels, 6 plays, 2 short story collections, 11 essay anthologies, a book on the history of Tamil literature, books on Tamil linguistics and children's books. During 1961-71, he was the head of the Tamil department at the University of Madras. In 1961, he was awarded the Sahitya Akademi Award for Tamil for his novel Agal Vilakku. During 1971-74, he was the vice-chancellor of the University of Madurai.