Zhengning County is a county in the east of Gansu province, China, bordering Shaanxi province to the east and south.

It was established in 420 AD during the Northern Wei dynasty as Yongzhou County.

[1][2] In 1635, rebel leader Li Zicheng fought a battle against Ming dynasty general Cao Wenzhao (zh:曹文诏) in Zhengning.

[3] Zhengning County's important agriculture products are tobacco, scallion and apples.

[6] The county government is located in Shanhe town.