Without knowing the demography it is not possible to identify the characteristics of Kadayampatti. Hence, experts have conducted surveys in order to throw some light about the demography of Kadayampatti as such. In this regard, the Census report that has been published in the year 2001 is quite significant. According to the report, the total population of Kadayampatti has been measured to be 9691. Out of the total population , Males comprise of 54 percent while the population of females is 46 percent. In Kadayampatti, 12 percent of the total population is below six years of age.
As far as the average literacy rate of Kadayampatti is concerned, it is lower than that of the entire nation. In other words, average literacy rates of Kadayampatti and also India are 53 percent and 59.5 percent. Out of it, rate of male literacy constitutes of 61percent and female literacy rate is 44 percent.