Indiacensus, Kappiyarai had a population of 13,475. Males constitute 50% of the population and females 50%. Kappiyarai has an averageliteracy rate of 82%, higher than the national average of 59.5%: male literacy is 84%, and female literacy is 80%. In Kappiyarai, 9% of the population is under 6 years of age.