Zadoi County (Tibetan: རྫ་སྟོད་རྫོང་།, Wylie: rdza stod rdzong, ZYPY: Zadoi Zong; also Dzatö or Dzatoe) is a county of Qinghai Province, China. It is under the administration of Yushu Tibetan Autonomous Prefecture. The county seat is in the Town of Qapugtang (Chinese: 萨呼腾 Sàhūténg).