The Amazon River, which many hydrologists argue is longer than the Nile depending on how its mouth is measured, rises high in the Peruvian Andes near Arequipa. Guinness World Records currently credits the Nile as the official record holder at 6,695 kilometers, but estimates that include the Amazon's Para estuary put its length at around 6,750 kilometers. The debate over which river is truly the longest remains unresolved among scientists.
Record no. MRB-2026-006000
Source of One of the World's Longest Rivers
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.