Locations of the World's Four Longest Rivers: Nile, Amazon, Yangtze, Mississippi

These are the world's four longest rivers by most measures (order debated for #1–2):

1. Nile River (Africa) – ~6,650 km (4,130 mi)
   Flows north through 11 countries: Burundi, Rwanda, Tanzania, Uganda, South Sudan, Sudan, Egypt. Drains to Mediterranean Sea. Longest in Africa & historically considered world's longest.
2. Amazon River (South America) – ~6,400–6,992 km (3,976–4,345 mi)
   Flows east across Brazil, Peru, Colombia, Bolivia, Ecuador, Venezuela, Guyana. Largest by discharge (20% of global river flow). Drains to Atlantic. Some studies argue it's longer than the Nile.
3. Yangtze River / Chang Jiang (Asia) – 6,300 km (3,915 mi)
   Longest in Asia; entirely within China. Flows from Tibetan Plateau to East China Sea at Shanghai. Three Gorges Dam. Third longest globally.
4. Mississippi River (North America) – 3,766 km (2,340 mi) from Lake Itasca; 5,971 km (3,710 mi) with Missouri River
   Drains 32 U.S. states + 2 Canadian provinces. Flows south to Gulf of Mexico. Fourth longest globally (or third if Missouri counted as main stem).

Each river shapes continental climate, agriculture, transport, and civilization. The Nile and Yangtze cradled ancient cultures; the Amazon holds unparalleled biodiversity; the Mississippi built America's heartland.