Nilaiyur is a village in Manamelkudi tehsil in district of Pudukkottai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Nilaiyur was 1,076 which includes 531 males and 545 females. Nilaiyur covers 447.47 ha area. Pincode of Nilaiyur is 614616.