Tiruvannamalai District also known as Thiruvannamalai is one of the 32 districts in the state of Tamil Nadu, in South India. It was formed in the year 1989 from non-existing North Arcot District as Tiruvannamalai Sambuvarayar and Vellore Ambedkar. Tiruvannamalai town is the district headquarters. The district is divided into 10 Taluks - Chengam, Tiruvannamalai, Polur, Thandarampattu, Aarani, Vandavasi, kalasapakkam, chetpet and Cheyyar, vembakkam Aarani is famous for silk sarees. As of 2011, the district had a population of 2,464,875 with a sex-ratio of 994 females for every 1,000 males.