Sadayamangalam is a village in Devakottai tehsil in district of Sivaganga, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Sadayamangalam was 752 which includes 379 males and 373 females. Sadayamangalam covers 361.47 ha area. Pincode of Sadayamangalam is 630318.