S. Austin (born 1959) is an Indian politician from Tamil Nadu. He is a three time member of the Tamil Nadu Legislative Assembly. He was elected from the Nagercoil Assembly constituency in Kanyakumari district representing the Dravida Munnetra Kazhagam.

Austin first became an MLA winning the 2001 Tamil Nadu Legislative Assembly election. Later he was elected from Kanyakumari constituency in 2016 election. In the 2026 Tamil Nadu Legislative Assembly election he won from the Nagercoil Assembly constituency representing the DMK. He polled 69,880 and defeated his nearest rival, G. Bervin Kings of the Tamilaga Vettri Kazhagam, by a margin of 7,570 votes.