The longest river in Egypt, crucial to its ancient civilization, is the Nile River. Spanning approximately 6,650 kilometers (4,130 miles), it has been central to Egyptian life for millennia, providing water for agriculture, supporting ecosystems, and facilitating trade and transportation. The Nile's annual flooding deposited nutrient-rich silt on the land, allowing for productive farming, which in turn supported the growth of ancient cities and societies. This relationship between the river and the people fostered the development of one of the world’s earliest and most influential civilizations.