: cojang poirig ranggyong kü) is an autonomous prefecture of northeastern Qinghai Province, China.

The prefecture has an area of 39,354 square kilometres (15,195 sq mi) and its seat is Haiyan County.

This Tibetan culture area was incorporated into Qinghai province in the early 1950s, as it lies distant from the Tibet Autonomous Region.

[2] According to the 2000 census, Haibei had 258,922 inhabitants with a population density of 6.58 inhabitants/km2.

The following is a list of ethnic groups in the prefecture, as of the 2000 census.