Nagamangalam is a village in Denkanikottai tehsil in district of Krishnagiri, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Nagamangalam was 4,948 which includes 2,502 males and 2,446 females. Nagamangalam covers 2478.5 ha area. Pincode of Nagamangalam is 635113.