Mirganj is a village in Krityanand Nagar tehsil of Purnia district, Bihar. It is located about 9 km from Krityanand Nagar tehsil headquarters and around 26 km from Purnia district headquarters. Bela Rikabganj is the Gram Panchayat for Mirganj village. As per Census 2011, the village code of Mirganj is 223420. The village covers a geographical area of 38 hectares. Purnia is the nearest town, located about 26 km away.