Longtan Township () is a township in Yuanjiang Hani, Yi and Dai Autonomous County, Yunnan, China. As of the 2017 census it had a population of 5,171 and an area of .
As of 2016, the township is divided into one community and six villages:
The township sits at the eastern Yuanjiang Hani, Yi and Dai Autonomous County. It is surrounded by Ganzhuang Subdistrict on the northwest, Shiping County on the northeast, Wadie Township on the southeast, and Lijiang Subdistrict on the southwest.
The township experiences a subtropical monsoon climate, with an average annual temperature of , and total annual rainfall of .
The highest point is Mount Qintian (), elevation
There are five major streams in the township, namely the Deng'er Stream (), Luyechong Stream (), Anaichong Stream (), Dazhujing Stream (), and Xiangjiaochong Stream ().
The economy of the township has a predominantly agricultural orientation, including farming and pig-breeding. Significant crops include rice, wheat, and corn. Tobacco, sugarcane, and rape are the economic plants of this region. The region abounds with iron, lead, zinc, silver, and silicon.