Ariyalur is a legislative assembly, that includes the city of Ariyalur. Its State Assembly Constituency number is 149. Until 2006, Ariyalur Assembly constituency was part of Perambalur Lok Sabha constituency. Since 2006, it has been a part of Chidambaram Lok Sabha constituency.[2][3] It is one of the 234 State Legislative Assembly Constituencies in Tamil Nadu, in India.