Vedaranyam comes under the Vedaranyam assembly constituency and it elects a member to the Tamil Nadu Legislative Assembly once every five years. From the 1977 elections, the assembly seat was won by Dravida Munnetra Kazhagam (DMK) five times during 1977, 1984, 1996, 2001 and 2006 elections, Anna Dravida Munnetra Kazhagam (ADMK) three times during 1980, 2011 and 2016 elections and Indian National Congress for two times during 1989 and 1991 elections. The current MLA of the constituency is O. S. Manian from the ADMK party.