Yatdam is a Sub-District (Tehsil/Block/Mandal) in the Changlang District of Arunachal Pradesh. As par Census 2011 information the sub-district code of Yatdam is 01670. There are about 15 sub-districts in Changlang and Yatdam is one of them. Bordumsa, Changlang, Diyun, Jairampur, Kharsang, Khimiyong, Lyngok Longtoi, Manmao, Miao, Nampong, Namtok, Renuk, Tikhak Rima Putok, Vijoynagar etc. are other sub-districts in Changlang.There are about 20 villages in Yatdam sub-district, which you can browse from villages list.