Mailam is a state assembly constituency in Tamil Nadu, India, that was formed after constituency delimitations in 2008. Its State Assembly Constituency number is 71. Located in Viluppuram district, it comprises portions of the Gingee and Tindivanam taluks. It is included in Arani Lok Sabha constituency for national elections to the Parliament of India. It is one of the 234 State Legislative Assembly Constituencies in Tamil Nadu in India.