Gangalamahadevi 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 Gangalamahadevi was 556 which includes 272 males and 284 females. Gangalamahadevi covers 129.93 ha area. Pincode of Gangalamahadevi is 606901.