Yuexi County (, , ) is a county located in the north of the Liangshan Yi Autonomous Prefecture, in the south of Sichuan Province, China.
Under imperial China, the area and its seat of government were known as or , variously read as Yuèxë or Yuèsuàin modern Chinese.
Yuexi County comprises 17 towns and 2 townships.
The frog species Oreolalax liangbeiensis, Oreolalax puxiongensis, and Oreolalax pingii are endemic to Yuexi County. The former two have only been recorded in the Puxiong Town.