Achalvadi is a village in Harur tehsil in district of Dharmapuri, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Achalvadi was 2,907 which includes 1,436 males and 1,471 females. Achalvadi covers 613.65 ha area. Pincode of Achalvadi is 636903.