Amar Nath Rai (born 1 November 1955) is a professor of biochemistry at the North Eastern Hill University, Shillong, India. He had served as Vice Chancellor of Mizoram University and North Eastern Hill University. Between 2013 and 2015 he was Director of the National Assessment and Accreditation Council (NAAC) of India. He had been a Visiting Professor at Uppsala University and Stockholm University, Sweden. His research in nitrogen fixation and symbiosis in cyanobacteria are internationally acclaimed. He is an elected Fellow of the Linnean Society of London.