乌桑巴拉山脉是坦桑尼亚东北部的出脉，长110公里、阔64公里，最高点海拔2,440米，山脉在20亿年前形成，山区居民大多从事自给农业，当地人口以每年4%增长，高于全国平均增长率2.1%。

The Usambara Mountains are a mountain range of northeastern Tanzania, within the Lushoto District of the Tanga Region, in tropical eastern Africa. The range is approximately 90 kilometres (56 mi) long and about half that wide. The rock is of Precambrian metamorphic origin, and the mountains were formed nearly two million years ago by faulting and uplifting. They are split into two sub-ranges; the West Usambaras are higher and the East Usambara are closer to the coast and receive more rainfall.