Sarairanjan is a Sub-District (Tehsil/Block/Mandal) in the Samastipur District of Bihar. As par Census 2011 information the sub-district code of Sarairanjan is 01295. There are about 20 sub-districts in Samastipur and Sarairanjan is one of them. Bibhutpur, Bithan, Dalsinghsarai, Hasanpur, Kalyanpur, Khanpur, Mohanpur, Mohiuddinagar, Morwa, Patori, Pusa, Rosera, Samastipur, Shivaji Nagar, Singhia, Tajpur, Ujiarpur, Vidyapati Nagar, Warisnagar etc. are other sub-districts in Samastipur.There are about 58 villages in Sarairanjan sub-district, which you can browse from villages list.