The 10 Longest Rivers in the World

Rivers have shaped human civilization more than almost any other geographic feature. They provided water, food, transport, and fertile land. The longest rivers span continents and drain millions of square kilometers. Here is the full ranking.

The Nile vs. the Amazon Debate

The Nile has long been listed as the world's longest river at approximately 6,650 km. But some recent measurements suggest the Amazon may be slightly longer, depending on where the source is defined. Different measuring methods yield different results. The Nile holds the traditional title; the debate continues.

The 10 Longest Rivers

1. Nile — 6,650 km

Flowing northward through northeastern Africa, the Nile passes through 11 countries before emptying into the Mediterranean in Egypt. Ancient Egyptian civilization was entirely dependent on its annual floods, which deposited nutrient-rich silt across the desert floodplain.

2. Amazon — 6,400 km

The Amazon may be slightly shorter than the Nile by length, but it is the undisputed champion by water volume, discharging about 20% of all the freshwater that enters the world's oceans. Its basin covers 7 million km² and contains the planet's largest tropical rainforest.

3. Yangtze — 6,300 km

China's longest river flows from the Tibetan Plateau to the East China Sea. The Yangtze is home to the Three Gorges Dam, the world's largest hydroelectric power station. The river has been central to Chinese civilization for thousands of years.

4. Mississippi-Missouri — 6,275 km

The Mississippi-Missouri system drains about 40% of the contiguous United States. The Mississippi alone has played a defining role in American history, serving as a natural boundary, a trade highway, and a cultural symbol from Mark Twain to blues music.

5. Yenisei-Angara — 5,539 km

Flowing through Siberia from Mongolia to the Arctic Ocean, the Yenisei is the world's largest river system by discharge after the Amazon. It drains Lake Baikal, the world's deepest lake, through its tributary the Angara.

6. Yellow River (Huang He) — 5,464 km

Known as "China's Sorrow" for its catastrophic historical floods, the Yellow River is considered the cradle of Chinese civilization. Its name comes from the vast amount of yellow silt (loess) it carries. It flows through the Loess Plateau, one of the most eroded landscapes on Earth.

7. Ob-Irtysh — 5,410 km

Another great Siberian river system, the Ob-Irtysh drains a huge swath of Central Asia and western Siberia. The Ob estuary (gulf) is one of the world's largest, stretching 800 km into the Arctic.

8. Congo — 4,700 km

The Congo is Africa's second-longest river and the world's deepest at over 220 meters. It is the only major river that crosses the equator twice. Its basin contains the world's second-largest tropical rainforest after the Amazon.

9. Amur — 4,444 km

The Amur forms the border between Russia and China for much of its length. It is one of the world's great salmon rivers and flows east into the Pacific, making it the only major Siberian river that does not drain into the Arctic.

10. Lena — 4,400 km

The Lena is one of three great Siberian rivers draining into the Arctic Ocean. In winter it freezes solid and serves as a road. Its delta, one of the largest in the world, is a UNESCO World Heritage Site and a critical habitat for migratory birds.

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