Sir Chettur Madhavan Nair PC CIE (24 January 1879 – 3 March 1970) (styled Sir Madhavan Nair) was an Indian lawyer who served as Advocate-General of Madras, a justice of the Madras High Court and member of the Privy Council of the United Kingdom.
Madhavan Nair was educated at Victoria College, Palakkad and matriculated from the Pachaiyappa's High School, Madras.
He served as judge of the Madras High Court till retirement on 2 January 1939, upon which he was knighted.
The couple resided at a property named Lynwood in Madhavan Nair Colony near Mahalingapuram, Madras.
Daughter Narayani married Parakkat Madhava Menon ICS and has two children Parvati Ramkumaran and Janaki Nair.