Dudhnai is a Sub-District (Tehsil/Block/Mandal) in the Goalpara District of Assam. As par Census 2011 information the sub-district code of Dudhnai is 02016. There are about 5 sub-districts in Goalpara and Dudhnai is one of them. Balijana, Lakhipur, Matia, Rangjuli etc. are other sub-districts in Goalpara.There are about 67 villages in Dudhnai sub-district, which you can browse from villages list.