Birnagar Raghunath is a village in Banmankhi tehsil in district of Purnia, Bihar, India. As per the data provided by Census of India in 2011, total population of Birnagar Raghunath was 416 which includes 228 males and 188 females. Birnagar Raghunath covers 15 ha area. Pincode of Birnagar Raghunath is N/A.