Nangqên County, or Nangchen, is a county of the Yushu Tibetan Autonomous Prefecture and is the southernmost county-level division of Qinghai province, China, bordering the Tibet Autonomous Region to the south. It was one of the five kingdoms of the historical region of Kham.

Yushu Tibetan Autonomous Prefecture, also transliterated as Yüxü or Yulshul, is an autonomous prefecture of Southwestern Qinghai Province, China. Largely inhabited by Tibetans, the prefecture has an area of 188,794 square kilometres (72,894 sq mi) and its seat is located in the town of Gyêgu in Yushu County, which is the place of the old Tibetan trade mart of Jyekundo. The official source of the Yellow River lies within the prefecture. Historically, the area belongs to the cultural realm of Kham in Eastern Tibet.