As of 2001[update] India census, Neikkarapatti had a population of 11,891. Males constitute 50% of the population and females 50%. Neikkarapatti has an average literacy rate of 65%, higher than the national average of 59.5%: male literacy is 75%, and female literacy is 55%. In Neikkarapatti, 9% of the population is under 6 years of age.
There are a total of four main schools in Neikkarapatti. They are Guruvappa higher secondary school, Sri Renugadevi Higher Secondary School, Crescent Matriculation School, and P.R.G. Velappa Naidu Matriculation Higher Secondary School. Guruvappa Higher Secondary School was established in 1969. Until last decade, this school was the only higher secondary school for the western part of Palani Taluk. Arulmigu Palani Andavar Arts College for Women, is also near the village. There are some historical buildings.