Modaiyur is a village in Polur tehsil in district of Tiruvannamalai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Modaiyur was 2,721 which includes 1,358 males and 1,363 females. Modaiyur covers 561.48 ha area. Pincode of Modaiyur is 606902.