Radhanur is a village in Tiruvadanai tehsil in district of Ramanathapuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Radhanur was 2,402 which includes 1,247 males and 1,155 females. Radhanur covers 1778.14 ha area. Pincode of Radhanur is 623401.