K. Sankaran Nair (20 December 1919 – 17 November 2015), known as Colonel Menon among his colleagues, was an Indian civil servant, diplomat and the director of Research and Analysis Wing. He served as the Indian High Commissioner to Singapore from 1986 to 1988 and was the last surviving member of the Indian Imperial Police. He was reported to have played a crucial role in the formation of Bangladesh, through R&AW operations during the Bangladesh Liberation War.