Tiemenguan is a county-level city in Xinjiang Uyghur Autonomous Region, China.

The city implemented the "division and city integration" (师市合一, shī shì héyī) management system, it shares the same leader group with the 2nd Division.

Tiemenguan governs an area of 590.27 square kilometres (227.90 sq mi) and has a population of 200,000.

It is the sixth city in Xinjiang converted from XPCC land, after Shihezi, Aral, Tumxuk, Wujiaqu, and Beitun.

The city is named after the nearby Iron Gate Pass (Tiemen Guan in Chinese).