As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 108 Raghunathpur Assembly constituency is composed of the following: Raghunathpur and Hussainganj community development blocks; Shekpura, Piyaur, Aranda, Gayghat and Usari Bujurg gram panchayats of Hasanpura CD Block.[1]
Raghunathpur Assembly constituency is part of No. 18 Siwan (Lok Sabha constituency) .[1]
Raghunathpur consists of village's like Rajpur, Kausar, Murarpatti, Mathia, Semaria, Narakatia, Khap banakat, Narhan, Adampur, Lagusa, Nikhti, Jhakhara etc.