S. Madhavan was an Indian politician and former Member of the Legislative Assembly of Tamil Nadu. He was elected to the Tamil Nadu legislative assembly as a Dravida Munnetra Kazhagam candidate from the Thirukoshtiyur constituency in the 1962 election, from the in 1967 and 1971, and as an Anna Dravida Munnetra Kazhagam candidate in 1984 election.