This is a list of the river and lake watersheds in the world larger than 400,000 square kilometers.

1. Amazon River - 6,144,727 km²
2. Congo River - 3,730,474 km²
3. Nile River - 3,254,555 km²
4. Mississippi River - 3,202,230 km²
5. Ob River - 2,972,497 km²
6. Paraná River - 2,582,672 km²
7. Yenisei River - 2,554,482 km²
8. Lake Chad - 2,497,918 km²
9. Lena River - 2,306,772 km²
10. Niger River - 2,261,763 km²
11. Amur River - 1,929,981 km²
12. Mackenzie River - 1,743,058 km²
13. Chang Jiang - 1,722,155 km²
14. Volga River - 1,410,994 km²
15. Zambezi River - 1,332,574 km²
16. Tarim River - 1,152,447 km²
17. Nelson River - 1,093,442 km²
18. Indus River - 1,081,733 km²
19. St. Lawrence River - 1,049,621 km²
20. Murray River - 1,072,000 km²
21. Ganges River - 1,016,104 km²
22. Orinoco River - 953,598 km²
23. Huang He - 945,065 km²
24. Orange River - 941,421 km²
25. Yukon River - 847,642 km²
26. Mekong River - 805,627 km²
27. Danube River - 795,686 km²
28. Syr Darya - 782,669 km²
29. Tigris-Euphrates Rivers - 765,831 km²
30. Tocantins River - 764,183 km²
31. Okavango River - 721,277 km²
32. Colorado River (U.S.) - 703,132 km²
33. Kolyma River - 679,908 km²
34. Columbia River - 657,490 km²
35. Brahmaputra River - 651,334 km²
36. São Francisco River - 617,812 km²
37. Rio Grande - 608,023 km²
38. Amu Darya - 534,764 km²
39. Dnieper River - 531,817 km²
40. Lake Balkhash - 512,010 km²
41. Jubba River - 497,655 km²
42. Don River - 458,703 km&sup2
43. Limpopo River - 421,168 km²
44. Senegal River - 419,659 km²
45. Irrawaddy River - 413,674 km²
46. Pearl River - 409,458 km²
47. Colorado River (Argentina) - 402,956 km²

External links

• Links to maps of watersheds (http://earthtrends.wri.org/maps_spatial/index.cfm?p=2&theme=2)