V.S. Sunder (Vaikalathur Shankar Sunder) (born 6 April 1952) is an Indian mathematician who specialised in subfactors, operator algebras and functional analysis in general.
He was awarded in 1996 the Shanti Swarup Bhatnagar Prize for Science and Technology, the highest science award in India, in the mathematical sciences category. Prof. Sunder is one of the first Indian operator algebraists. In addition to publishing about sixty papers, he has authored six books including at least three monographs at the graduate level or higher on von Neumann algebras. One of the books was co-authored with Vaughan Jones, an operator algebraist, who has received the Fields Medal.