| Ndurumu River | |
| Pushpin Map: | Burundi |
| Subdivision Type1: | Country |
| Subdivision Name1: | Burundi |
| Subdivision Type2: | Province |
| Subdivision Name2: | Karuzi Province, Ngozi Province |
| Mouth: | Akanyaru River |
| Mouth Location: | Marangara Hydroelectric Power Station |
| Mouth Coordinates: | -2.7304°N 29.9649°W |
The Ndurumu River (French: Rivière Ndurumu) is a river in Burundi. It flows west through Kirundo Province and Ngozi Province to join the Akanyaru River on the border with Rwanda.
The Ndurumu River rises in the Ntega and Vumbi communes of Kirundo Province, and in the Kiremba and Marangara communes of Ngozi Province.It flows in a generally west-southwest direction, turning west and then northwest at the Ndurumu Hydroelectric Station.
The watershed of the Ndurumu River above the Marangara Hydroelectric Power Station is rugged, wth slopes between 5% and 55%. The climate is tropical humid, with average annual rainfall of . More than 53.34% of the population of the watershed cultivate farms of less than and earn less than 100 dollars per year.Soil erosion is a serious problem.
As of June 2024 the Marangara Hydroelectric Power Station was at a standstill.Farmers upstream of the dam along the Ndurumu River had cut down almost all the trees and planted crops such as cassava and banana.During heavy rainfall tons of earth, stones and trees are washed into the valley, digging huge furrows and forming a mountain of mud and stones in the reservoir.