As of 2001[update] India census, Ponneri had a population of 24,205. Males constitute 50% of the population and females 50% and with Minjur population,with postal code 601204,considered it could be of 50,000 as ponneri state offices governs most of state implementations on all blocks under ponneri taluk. Neighbouring towns are Minjur and Athipattu with development underway on NCTPS power plant project. Ponneri has an average literacy rate of 73%, higher than the national average of 59.5%. Approximately 81% of males and 66% of females are literate. About 10% of the population is under 6 years of age.