Semmiyamangalam is a village in Polur tehsil in district of Tiruvannamalai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Semmiyamangalam was 1,612 which includes 823 males and 789 females. Semmiyamangalam covers 454.47 ha area. Pincode of Semmiyamangalam is 606904.