Viswanathan is an Indian surname and given name. It is of Hindu origin and derives from višvanatha, meaning "lord of the universe" (from višva, "universe" + natha, "lord," an epithet of the god Shiva), + the Tamil-Malayalam third-person masculine singular suffix -n.
It may refer to:
G. Viswanathan (born 1938), founder and chancellor of VIT University in India
Kaavya Viswanathan (born 1987), Indian-American Harvard undergraduate student, noted for plagiarism in her 2006 novel
M. S. Viswanathan (1928-2015), Tamil film music composer
T. Viswanathan, (1927–2002), South Indian classical Carnatic fluteist
Viswanathan Anand (born 1969), World Chess Champion 2007-2013
