According to 2011 census, Kattivakkam had a population of 36,617 with a sex-ratio of 983 females for every 1,000 males, much above the national average of 929. A total of 4,301 were under the age of six, constituting 2,194 males and 2,107 females. Scheduled Castes and Scheduled Tribes accounted for 15.62% and .37% of the population respectively. The average literacy of the town was 74.5%, compared to the national average of 72.99%. The town had a total of : 9354 households. There were a total of 13,273 workers, comprising 17 cultivators, 49 main agricultural labourers, 201 in house hold industries, 10,613 other workers, 2,393 marginal workers, 4 marginal cultivators, 20 marginal agricultural labourers, 80 marginal workers in household industries and 2,289 other marginal workers.
E.T.P.S. Matriculation School is managed by "Ennore Thermal Power Station" under State government. This school is running its 30 year successfully on "2011", well trained teachers and staff. Good school environment inside the campus.
Another Government Higher Secondary School is situated at Ennore