Nangqên County, or Nangchen (Tibetan: ནང་ཆེན།, ZYPY: nang chen, Chinese: 囊谦县; pinyin: Nángqiān Xiàn), is a county of Yushu Tibetan Autonomous Prefecture in southernmost Qinghai province, China.
The county seat is Xangda (shor mda’ / Xiāngdá Zhèn 香达镇), built in a side valley and on the right bank of the Dza Chu (upper reaches of the Mekong). In 2000, the county's population amounted to 57.387 people, inhabiting a surface of 11.539 km².
The county's name is derived from the former king (nang chen rgyal po) and kingdom of Nangchen, a tribal confederation that adhered to the Chinese government of Gansu (after 1928 to newly established Qinghai province), but was highly autonomous. The present-day's county comprises the core area of that kingdom.
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Coordinates: 32°14′N 96°06′E / 32.233°N 96.100°E