Pirarthu Khurd is a village in Daraundha tehsil in district of Siwan, Bihar, India. As per the data provided by Census of India in 2011, total population of Pirarthu Khurd was 1,803 which includes 833 males and 970 females. Pirarthu Khurd covers 91 ha area. Pincode of Pirarthu Khurd is N/A.