Mengshan County is subordinate to Wuzhou City of Guangxi Zhuang Autonomous Region, located in the east of Dayaoshan Mountain in the east of Guangxi, northwest of Wuzhou, adjacent to Zhaoping in the east, Jinxiu in the west, Pingnan and Tenge County in the south, and Lipu in the north. Mengshan Town is 460 kilometers away from Nanning, the capital city, and 186 kilometers away from Wuzhou. The total area is 1279 square kilometers. By the end of 2014, it had jurisdiction over 6 towns and 3 townships. According to the seventh census, the permanent population of Mengshan County was 164,420 as of midnight on November 1, 2020.

Mengshan County is surrounded by mountains, narrow east and west, long north and south, the whole territory is long; The terrain is high in the northeast, low in the southwest, the territory of the mountains undulating, ravines, terrain intricate; It is a subtropical monsoon climate zone with mild climate, abundant rainfall, long summer and short winter.

In 2020, the GDP of Mengshan County reached 7.8 billion yuan, an increase of 3.5% year on year.
Mengshan County is the most beautiful eco-tourism demonstration city in China, the national ecological demonstration zone, and the key ecological function zone in Guangxi, where the Taiping Heavenly Kingdom was once enthroned. Mengshan was also home to Su Yuanchun, an anti-French soldier, Chen Manyuan, an old-generation revolutionary, and Liang Yusheng, a writer of new-style martial arts novels. In December 2018, it was awarded the second batch of national demonstration cities and counties for ecological civilization construction. On January 22, 2020, it was named the National garden County by the Ministry of Housing and Urban-Rural Development.