Purana Dimainu is a village in Umrangso tehsil in district of Dima Hasao, Assam, India. As per the data provided by Census of India in 2011, total population of Purana Dimainu was 94 which includes 46 males and 48 females. Purana Dimainu covers 45 ha area. Pincode of Purana Dimainu is N/A.