Radhamangalam is a village in Kilvelur tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Radhamangalam was 2,389 which includes 1,193 males and 1,196 females. Radhamangalam covers 329.08 ha area. Pincode of Radhamangalam is 611109.