Pannaitheru is a village in Thirukkuvalai tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Pannaitheru was 2,087 which includes 1,005 males and 1,082 females. Pannaitheru covers 407.15 ha area. Pincode of Pannaitheru is 614711.