Menghai County is a county located in the southern part of Yunnan Province, China. It falls under the jurisdiction of the Xishuangbanna Dai Autonomous Prefecture and serves as a border region adjacent to Burma's Shan State to the south and west.
The name "Meng" within the county's designation is noted as a variation of "Mueang." The area is characterized by its geographical position in the far south of China, bordering neighboring territories.