Lhünzhub is a small town, the administrative center of Lhünzhub County in the Lhasa Prefecture of Tibet, China. It is located northeast of Lhasa.
Lhünzhub has jurisdiction over six villages, with a population of 7349 people, all ethnic Tibetan. The economy is dominated by agriculture and animal husbandry. There are of arable land producing barley, wheat, rape and other crops. The town has a primary school and a clinic. There is a small hydropower station. The town lies on the Pengbo River.
The average temperature is and the average annual precipitation is . January is the driest month, with no rainfall, and August is the wettest with an average of .