Melaiyur I is a village in Mannargudi tehsil in district of Thiruvarur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Melaiyur I was 1,748 which includes 836 males and 912 females. Melaiyur I covers 380.52 ha area. Pincode of Melaiyur I is 614013.