Biru County (; ) is the most populated county within Nagqu of the Tibet Autonomous Region, China. The name means "female yak". Either of the following pronunciations can be considered correct in Standard Tibetan: [bìru] ~ [pìru] (conventionally written Biru in English) or [ÃÂìru] ~ [ÃÂìru] (conventionally Driru).
Biru lies in the southwest part of the former province of Kham. To its east is Chamdo and to its west Nagchu. Biru is located on the Gyalmo Ngulchu River (upper part of Salween River). Diru is bordered by Sog County to the northwest and the extreme east of Banbar Countyà ¼Â, is also surrounded by Lhari County to the south, and extreme north to the Nagchu county.
Sepu Kangri is located in the county.
Biru county contains the following 2 towns and 8 townships:
At the 2020 PRC census, the county's population was 72,618, of whom: