Erahanahalli is a village in Sathyamangalam tehsil in district of Erode, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Erahanahalli was 2,921 which includes 1,498 males and 1,423 females. Erahanahalli covers 848.95 ha area. Pincode of Erahanahalli is 638461.