Environment Geography Science What is the longest river in the world? November 21, 2025 by Riding The longest river in the world is the Nile River, which stretches approximately 6,650 kilometers (4,130 miles) through northeastern Africa. The Nile flows through 11 countries, including Egypt and Sudan, and is crucial for agriculture and water supply in the region. However, some studies suggest that the Amazon River might be longer, depending on how […] Read more »