The World's Longest River: The Nile (6,650 km)
The Nile River is the longest river in the world at 6,650 km (4,132 miles).
Key Facts
- Source: Lake Victoria (Uganda) — White Nile headwaters; Blue Nile from Lake Tana (Ethiopia)
- Confluence: Khartoum, Sudan (White + Blue Nile)
- Mouth: Mediterranean Sea (Nile Delta, Egypt)
- Countries traversed: 11 (Tanzania, Uganda, Rwanda, Burundi, DRC, Kenya, Ethiopia, Eritrea, South Sudan, Sudan, Egypt)
- Drainage basin: 3.25M km² (~10% of Africa)
The Amazon Controversy
Some Brazilian scientists argue the Amazon (6,400-6,992 km depending on source definition) is longer. Key disputes:
- Amazon's true source: Apurímac vs. Mantaro rivers
- Measuring to tidal limit vs. estuary
- Seasonal channel migration
Consensus (USGS, NG, Britannica, most geographers): Nile remains #1.
Other Major Rivers
| River | Length | Primary Countries |
| Amazon | 6,400 km | Brazil, Peru, Colombia |
| Yangtze | 6,300 km | China |
| Mississippi-Missouri | 6,275 km | USA |
| Yenisey-Angara | 5,539 km | Russia, Mongolia |
| Yellow River | 5,464 km | China |
| Ob-Irtysh | 5,410 km | Russia, China, Kazakhstan, Mongolia |
The Nile's length, historical centrality, and transboundary complexity make it uniquely significant.