鲁济济河（法语：Rusizi）是一条中部非洲的河流，由基伏湖流至坦干伊喀湖。鲁济济河由海拔高度1500公尺处下降至约770公尺处。在鲁济济河的南端终点，形成了鲁济济冲积平原，地形起伏非常平缓。在流入坦干伊喀湖前，鲁济济河形成了一个三角洲。

卢旺达及刚果民主共和国的南部国界即以鲁济济河划分。顺着坦干伊喀湖，鲁济济河也划出了布隆迪与刚果民主共和国间的国界。一座称为「和谐大桥」被建造在接近鲁济济河的河口处，连接了布隆迪与刚果民主共和国。

鲁济济一号水力发电厂建筑于1958年，位在鲁济济河由基伏湖流出处，影响了基伏湖的水位及水的流出。该水力发电厂经由木鲁鲁（Mururu）中继站提供电力给布班扎（Bubanza）及基戈马（Kigoma）。目前，该水力发电厂每年可产生148000000度的电力。

The Ruzizi (also sometimes spelled Rusizi) is a river, 117 kilometres (73 mi) long, that flows from Lake Kivu to Lake Tanganyika in Central Africa, descending from about 1,500 metres (4,900 ft) to about 770 metres (2,530 ft) above sea level over its length. The steepest gradients occur over the first 40 kilometres (25 mi), where hydroelectric dams have been built. Further downstream, the Ruzizi Plain, the floor of the Western Rift Valley, has only gentle hills, and the river flows into Lake Tanganyika through a delta, with one or two small channels splitting off from the main channel.