M. Krishnan Nair

M. Krishnan Nair may refer to:


 * M. Krishnan Nair (author) (1923–2006), Indian Malayalam literary critic and orator
 * M. Krishnan Nair (doctor) (1939–2021), Indian oncologist, director of the Regional Cancer Centre in Thiruvananthapuram, Kerala
 * M. Krishnan Nair (director) (1926–2001), Indian film director of Malayalam films
 * M. Krishnan Nair (politician) (1870–1938), Indian politician, member of Madras Legislative Council