Ten largest river drainage basins worldwide 2021

Published by
Bruna Alves,
Feb 16, 2023
As of 2021, the Amazon basin, located in northern South America, was the largest drainage basin in the world. The Amazon River and its tributaries drain an area nearly seven million square kilometers.

Largest river drainage basins worldwide as of 2021 (in square kilometers)

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Release date

March 2021

Region

Worldwide

Survey time period

as of 2021

Supplementary notes

A river’s drainage basin is defined as the area of land where precipitation collects and drains off, feeding the flow of rivers and their tributaries. 

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