Dashan Township () is a township in Lancang Lahu Autonomous County, Yunnan, China. As of the 2017 census it had a population of 16,281 and an area of .
As of 2016, the township is divided into eight villages:
In the Republic of China, it belonged to the Banghai Township () and Daling Township ().
After establishment of the Communist State, in 1950, the Dashan District () was set up. It was merged into Donghe District () in 1958. In 1984, Dashan District was demerged from Donghe District. It was incorporated officially as a township in 1988.
The township is located in northeastern Lancang Lahu Autonomous County. It is surrounded by Jinggu Dai and Yi Autonomous County on the northeast, Fudong Township on the northwest, Qianliu Yi Ethnic Township on the southeast, and Donghe Township on the southwest.
The highest point in the township is the Baishantoujian Mountain () which stands above sea level. The lowest point is Liangshuijing (), which, at above sea level.
The Manghai River () flows through the township.
The township's economy is based on nearby mineral resources and agricultural resources. The main crops of the region are grains, followed by corns and wheat. Economic crops are mainly camellia oleifera, tea, castanea mollissima, and coffee bean. The region abounds with iron, manganese, tin, copper, lead, zinc, and limestone.
As of 2017, the National Bureau of Statistics of China estimates the township's population now to be 16,281.