The Blue Nile, the White Nile, and the Atbara merge in Khartoum, Sudan to form the Nile River. The Nile runs north through eleven different African nations and ends in Egypt, where it flows into the Mediterranean Sea. Along the way, it drains about 10% of the continent. While some argue that the Amazon is longer, that hasn’t been verified.

1. Nile: 4,132 miles (6,650 km)
2. Amazon: 3,977 miles (6,400 km)
3. Yangtze: 3,915 miles (6,300 km)
4. Mississippi–Missouri: 3,899 miles (6,275 km)
5. Yenisei–Angara–Selenga: 3,442 miles (5,539 km)
6. Yellow River: 3,395 miles (5,464 km)
7. Ob–Irtysh: 3,362 miles (5,410 km)
8. Río de la Plata–Paraná: 3,032 miles (4,880 km)
9. Congo: 2,920 miles (4,700 km)
10. Amur–Argun: 2,761 miles (4,444 km)