Huangyuan County is a county of Qinghai Province, China, it is under the administration of the prefecture-level city of Xining, the capital of Qinghai. It is under the administration of Xining city. The county seat is Chengguan Town, known in Mongolian as Dan Gar and in Tibetan as Tongkor.

Qinghai is an inland province in Northwestern China. It is the largest province of China by area and has the third smallest population. Its capital and largest city is Xining.