Two rivers, one name
Most rivers have a single headwater. The Nile has two, and they could hardly be more different. The White Nile begins in the Great Lakes region of East Africa, fed by streams that reach Lake Victoria before flowing out through Uganda. The most distant headwater of that system is genuinely disputed among geographers: some trace it to the Rukarara River in Rwanda, others to the Ruvyironza River in Burundi, both tributaries of the Kagera River that feeds Lake Victoria. The Blue Nile is more straightforward. It rises at Lake Tana in the Ethiopian highlands and carries the bulk of the Nile's floodwater and silt, even though it is the shorter of the two branches.
From Khartoum to the Mediterranean
The White Nile and Blue Nile converge at Khartoum, the capital of Sudan, and from there flow north as a single river through the Sahara. In southern Egypt the river backs up behind the Aswan High Dam into Lake Nasser, one of the largest reservoirs on Earth, before continuing past Cairo. North of Cairo the Nile fans out into the Nile Delta, splitting into the Rosetta and Damietta branches and finally reaching the Mediterranean Sea. That final stretch through the delta is also the most densely populated part of Egypt, since almost all Egyptian agriculture depends on Nile water and silt.
A source-to-sea route
A basin shared by many countries
The Nile basin spans eleven countries: Burundi, the Democratic Republic of the Congo, Egypt, Eritrea, Ethiopia, Kenya, Rwanda, South Sudan, Sudan, Tanzania, and Uganda. Ten of those eleven are full members of the Nile Basin Initiative, the intergovernmental body that coordinates management of the river, with Eritrea holding observer status. Egypt remains a member on paper but has kept its technical participation frozen since 2010, in a dispute over the basin's Cooperative Framework Agreement. Either way, the river crosses more national borders than almost any other on Earth, which is part of why it is so often at the center of disputes over water.
The Grand Ethiopian Renaissance Dam
The most consequential recent chapter in the Nile's story is the Grand Ethiopian Renaissance Dam, or GERD, on the Blue Nile in Ethiopia. Ethiopia inaugurated the dam on 9 September 2025, describing it as the largest hydropower project in Africa. Egypt and Sudan, both of which depend heavily on Nile water for agriculture and drinking supply, have pressed for a binding agreement on how the dam is filled and operated, and as of this writing no such trilateral agreement exists. Egypt has raised its objections at the United Nations Security Council, arguing that unilateral filling threatens its water security, while Ethiopia maintains the dam is a matter of national development and an eventual source of power for the wider region. The dispute is unresolved and worth watching, presented here without taking a side.
Quick facts
| Measure | Figure |
|---|---|
| Length | About 6,650 km (4,132 mi) by the conventional measure |
| Sources | Lake Victoria region (White Nile) and Lake Tana, Ethiopia (Blue Nile) |
| Confluence | Khartoum, Sudan |
| Mouth | Nile Delta, Mediterranean Sea, Egypt |
| Basin countries | 11, of which 10 are Nile Basin Initiative members and Eritrea is an observer |
| Major dam | Grand Ethiopian Renaissance Dam, inaugurated September 2025 |
Historically the Nile has been called the longest river on Earth, though the title is contested. A 2008 measurement that extended the Amazon's source further upstream put that river at roughly 6,992 km, ahead of the 6,853 km the same study measured for the Nile, and the question has not been settled by a universally accepted expedition since. Most reference works still credit the Nile as longest, with the caveat that the answer depends on exactly where a river's source is defined to begin.