Zhengdong (Chinese: 整董; pinyin: Zhěngdǒng) is a town in the Jiangcheng Hani and Yi Autonomous County of Yunnan in China.

Due to the erratic elevation, ranging from 820 metres (the majority of the town) to 1,698 metres in Beiyin Mountain, the layout is very unorganized, with most of the residents living in the flat part of the town.

The entire town has fertile soil and abundant rainfall, giving it a humid subtropical climate (CFA).

Its land is suitable for planting subtropical crops such as corn, sugar cane, tea, coffee, and fruits.

Along with Dai, its other main ethnic groups are Hani, Yao, Yi and Han.