According to the 2011 census, Thisayanvilai has a population of 23,702. Males constitute 48% of the population and females 52%. Thisayanvilai has an averageliteracy rate of 91.12%, higher than the state average of 80.09. Maleliteracy is 94.10%, and female literacy is 88.22%. In Thisayanvilai, 11.35% of the population is under 6 years of age. Of the late, many from the district immigrate there, in search of better employment, making it an immigrationhub.