Longest rivers:
| S. No. | River | Country/Continent | Distance (in km) |
| 1. | Nile | Africa | 6650 |
| 2. | Amazon | S. America | 6437 |
| 3. | Mississippi-Missouri | USA | 6020 |
| 4. | Yangtze | China | 5494 |
| 5. | Ob-Irtysh | Russia | 5410 |
| 6. | Zaire | Africa | 4828 |
| 7. | Lena | Russia | 4828 |
| 8. | Hwang Ho | China | 4344 |
| 9. | Mackenzie | Canada | 4241 |
| 10. | Mekong | Asia | 4180 |
| 11. | Niger | Africa | 4180 |
| 12. | St. Lawrence | Canada-USA | 4023 |
| 13. | Parana | S. America | 4000 |
| 14. | Yenisey | Russia | 3804 |
| 15. | Murray-Darling | Australia | 3780 |
| 16. | Volga | Russia | 3690 |
| 17. | Zambezi | Africa | 3540 |
| 18. | Maderia | S. America | 3218 |
| 19. | Purus | S. America | 3200 |
| 20. | Yukon-Teslin | Alaska-Canada | 3185 |
| 21. | Rio-Grande | USA-Mexico | 3040 |
| 22. | Indus | Asia | 2880 |
| 23. | Danube | Europe | 2850 |
| 24. | Amur | Asia | 2824 |
| 25. | Salween | Asia | 2815 |
| 26. | Shatt al-Arab | Tigris-Euphrates | 2740 |
| 27. | Brahmaputra | Asia | 2700 |
| 28. | Ganga | India | 2655 |
| 29. | Si | China | 2650 |
| 30. | Orinoco | S. America | 2575 |
| 31. | Nelson | Canada | 2570 |
| 32. | Ural | Russia-Kazakhstan | 2533 |
| 33. | Amu-Dar’ya | Turkmenistan-Uzbekistan | 2494 |
| 34. | Paraguay | S.America | 2494 |
| 35. | Colorado | USA-Mexico | 2333 |
| 36. | Dnieper | Ukraine | 2280 |
| 37. | Rio Negro | S. America | 2255 |
| 38. | Orange | Africa | 2188 |
| 39. | Syr-Darya | Kazakhstan | 2140 |
| 40. | Kama | Russia | 2040 |
| 41. | Irawaddy | Burma | 2010 |