Old Ziro is a Sub-District (Tehsil/Block/Mandal) in the Lower Subansiri District of Arunachal Pradesh. As par Census 2011 information the sub-district code of Old Ziro is 01696. There are about 8 sub-districts in Lower Subansiri and Old Ziro is one of them. Dollungmukh, Kamporijo, Pistana, Raga, Yachuli, Yazali, Ziro etc. are other sub-districts in Lower Subansiri.There are about 85 villages in Old Ziro sub-district, which you can browse from villages list.