Nirmali is a Sub-District (Tehsil/Block/Mandal) in the Supaul District of Bihar. As par Census 2011 information the sub-district code of Nirmali is 01101. There are about 11 sub-districts in Supaul and Nirmali is one of them. Basantpur, Chhatapur, Kishanpur, Marauna, Pipra, Pratapganj, Raghopur, Saraigarh Bhaptiyahi, Supaul, Tribeniganj etc. are other sub-districts in Supaul.There are about 22 villages in Nirmali sub-district, which you can browse from villages list.