Nibir Mandal (born 1963) is an Indian structural geologist and a professor of Geological Sciences at Jadavpur University. He is known for his studies on the evolution of geological structures and is an elected fellow of Indian Academy of Sciences, and the Indian National Science Academy. 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, one of the highest Indian science awards for his contributions to Earth, Atmosphere, Ocean and Planetary Sciences in 2005.