Rettamangalam is a village in Uthiramerur tehsil in district of Kancheepuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Rettamangalam was 637 which includes 307 males and 330 females. Rettamangalam covers 178 ha area. Pincode of Rettamangalam is 603107.