Tiruvannamalai is the capital city of Tiruvannamalai district. In order to improve the Tamil Nadu government administration this district has been carved from North Arcot district on 1989. North and west of Tiruvannamalai is covered by Vellore, where the Southwest is by Krishnagiri District. Both Villupuram and kanchipuram are located in South and east side of Tiruvannamalai district respectively.

District total population is 2181856. During summer the temperature reach upto 34.93 Celsius. On winter (November,december and January) 19.36 Celsius  degree.