1. Nile River - 6,650 kilometers (4,130 miles) - Located in northeastern Africa, flowing through multiple countries, including Egypt and Sudan, before emptying into the Mediterranean Sea.

2. Amazon River - Approximately 6,400 kilometers (about 4,000 miles) - Located in South America, primarily in Brazil, it is the largest river by discharge volume in the world.

3. Yangtze River - Approximately 6,300 kilometers (about 3,917 miles) - Located in China, it is the longest river in Asia and the third-longest in the world.

4. Mississippi-Missouri River System - Approximately 6,275 kilometers (about 3,902 miles) - Located in North America, it flows through the United States.

5. Yenisei River - 5,539 kilometers (3,445 miles) - Located in Siberia, Russia, it flows into the Arctic Ocean.

6. Yellow River (Huang He) - 5,464 kilometers (3,395 miles) - Located in China, it is often called the "Cradle of Chinese Civilization."

7 Ob River - 5,410 kilometers (3,364 miles) - Located in Siberia, Russia, it flows into the Arctic Ocean.

8. Parana-Paraguay River System - Approximately 4,880 kilometers (about 3,032 miles) - Located in South America, it flows through several countries, including Brazil, Paraguay, and Argentina.