Raghunathpur Baya is a village in Paroo tehsil in district of Muzaffarpur, Bihar, India. As per the data provided by Census of India in 2011, total population of Raghunathpur Baya was 5,647 which includes 2,934 males and 2,713 females. Raghunathpur Baya covers 364 ha area. Pincode of Raghunathpur Baya is 843126.