Yanqi Hui Autonomous County (simplified Chinese: 焉耆回族自治县; traditional Chinese: 焉耆回族自治縣; pinyin: Yānqí Huízú Zìzhìxiàn; Xiao'erjing: یًاٿِ خُوِذُو ذِجِشِیًا; Uyghur: يەنجى خۇيزۇ ئاپتونوم ناھىيىسى‎) is an autonomous county in the Xinjiang Uyghur Autonomous Region and is under the administration of the Bayin'gholin Mongol Autonomous Prefecture. It has an area of 2,429 km².