Kanak Saha is an Indian astrophysicist. He is an associate professor of astrophysics at Inter-University Centre for Astronomy and Astrophysics. His research interests include formation of galaxies in the early universe and their evolution. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology for his contributions to physical sciences in 2021.