Purainia Ruknuddin is a village in Karpi tehsil in district of Arwal, Bihar, India. As per the data provided by Census of India in 2011, total population of Purainia Ruknuddin was 1,261 which includes 631 males and 630 females. Purainia Ruknuddin covers 93 ha area. Pincode of Purainia Ruknuddin is N/A.