Chengam is a town in the Tiruvanamalai district of Tamil Nadu, India. Chengam is located at 12.3°N 78.8°E. It has an average elevation of 272 metres (892 feet). Chengam Municipality is located on the Pondicherry – Thiruvannamalai – Bangalore route, at a distance of 34 km from Thiruvannamalai. Chengam is a municipality in Tiruvannamalai district. As of the 2011 India census, Chengam had a population of 54,278 and an average literacy rate of 79.3%. Child population below 6 was 2,210 males and 2,479 females.Chengam has 142,845 people employed; 84,623 are male and 58,222 are female with an employment ratio of 50%. Chengam is 5th in Tiruvannamalai district and ranked 69th in Tamil Nadu. The literacy ratio is 68% with 170,277 total literate people. In terms of literacy, Chengam is ranked 6th in Tiruvannamalai district and 230th in Tamil Nadu.
Source : Wikipedia