Eraiyur is a village in Vanur tehsil in district of Viluppuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Eraiyur was 3,257 which includes 1,656 males and 1,601 females. Eraiyur covers 675.08 ha area. Pincode of Eraiyur is 604304.