Chintamani Nagesa Ramachandra Rao FRS, also known as C.N.R. Rao, is an Indian chemist who has worked mainly in solid-state and structural chemistry. He currently serves as the Head of the Scientific Advisory Council to the Prime Minister of India. Rao has honorary doctorates from 60 universities from around the world. He has authored around 1,500 research papers and 45 scientific books. He is the recipient of most of the major scientific awards, and is member of all major scientific organisations.
On 16 November 2013, the Government of India announced his selection for Bharat Ratna, the highest civilian award in India, making him the third scientist after C.V. Raman and A. P. J. Abdul Kalam to receive the award. He, along with the legendary cricketer Sachin Tendulkar, was conferred the award on 4 February 2014 by President Pranab Mukherjee in a special ceremony in the Durbar Hall of the Rashtrapati Bhavan.