Manas County, also written Manass (simplified Chinese: 玛纳斯县; traditional Chinese: 瑪納斯縣; pinyin: Mǎnàsī Xiàn; Wade–Giles: Ma-na-szŭ Hsien; Xiao'erjing: مَانَاسِ ﺷِﯿًﺎ; Uyghur: ماناس ناھىيىسى‎, ULY: Manas Nahiyisi, UYY: Manas Nah̡iyisi^?) is a county in the Xinjiang Uyghur Autonomous Region under the administration of the Changji Hui Autonomous Prefecture.