Rongkanthir is a village in Diphu tehsil in district of Karbi Anglong, Assam, India. As per the data provided by Census of India in 2011, total population of Rongkanthir was 424 which includes 204 males and 220 females. Rongkanthir covers 46 ha area. Pincode of Rongkanthir is N/A.