Nestled at Tamil Nadu ,Chengam is a panchyat town in the Tiruvannaamalai district .It is at an height of 272 metres above sea level (892 feet) and is located at 12.3° N 78.8° E.

According to the 2001 census Chengam had a population of about 23,200.The population of Chengam is equally divided between the males and the females.The literacy rate of this town is 65% which is higher than the national average literacy standard of 59.5% .The male and the female literacy rate is 72% and 58% respectively.12% of the population is under six years of age.