The Pincode 851204 of Khagaria Bazar P.O. represents Khagaria Bazar post office in Khagaria revenue district which comes under the Bihar postal circle of Muzaffarpur region.

In a land area of 27,120 square kilometers, the diocesan territory covers 12 civil districts of Muzaffarpur, Vaishali, Samastipur, Sitamarhi, Darbhanga, Madhubani, Saharsa, Begusarai, Madhepura, ...