|Country||People's Republic of China|
|• Total||590.27 km2 (227.90 sq mi)|
|• Density||340/km2 (880/sq mi)|
|Time zone||China Standard Time (UTC+8)|
Tiemenguan (simplified Chinese: 铁门关; traditional Chinese: 鐵門關; pinyin: Tiěménguān) is a county-level city in Xinjiang, People's Republic of China. It is located 50 kilometres (31 mi) west of Korla and 500 kilometres (310 mi) southwest of the regional capital Ürümqi.
The city was formerly the settled and cultivated areas of the Second Agricultural Division of the Xinjiang Production and Construction Corps (XPCC), which were converted to a city in December 2012, when the State Council of China approved the establishment of Tiemenguan City. It is the sixth city in Xinjiang converted from XPCC land, after Shihezi, Aral, Tumxuk, Wujiaqu, and Beitun. Like the other cities it is a county-level city directly administered by Xinjiang Autonomous Region without an intervening prefectural government. The city is named after the nearby Iron Gate Pass (Tiemen Guan in Chinese).
Tiemenguan governs an area of 590.27 square kilometres (227.90 sq mi) and has a population of 200,000. The seat of the city is at the settlement of the 29th Regiment of the Second Division of XPCC. The settlement of the 28th Regiment has been named Boguqi Town (博古其镇), and that of the 30th Regiment Shuangfeng Town (双丰镇). Both are under the administration of Tiemenguan.