Menghuan Subdistrict (simplified Chinese: 勐焕街道; traditional Chinese: 勐煥街道; pinyin: Měnghuàn Jiēdào) is an urban subdistrict in Mangshi, Yunnan, China. As of the 2017 census it had a population of 171,195 and an area of 23.15 square kilometres (8.94 sq mi). It is the political, economic and cultural center of Mangshi City and Dehong Dai and Jingpo Autonomous Prefecture.

As of 2010, the subdistrict is divided into 11 communities:

In Dai language, "Mangshi" is called "Menghuan", which means "the city of dawn". It is said that Gautama Buddha came here just at dawn, so he named it.

In 2007, Menghuan Subdistrict separated from Mangshi Town.

Mangjiu Reservoir (芒究水库) is a reservoir and the largest body of water in the subdistrict. It is very popular for boating, fishing and camping and is home to many residents from other areas of the province during the summer months.

Dehong Vocational College is located in the subdistrict.

The economy is supported primarily by commerce.