Vanur is a state assembly constituency in Viluppuram district of Tamil Nadu, India. Its State Assembly Constituency number is 73. The seat is reserved for candidates from the Scheduled Castes and comprises Vanur taluk and a portion of Viluppuram taluk. It is a part of Viluppuram 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.