| 1 | NileMajor river in northeastern Africa | 6,650 km |
| 2 | | 6,992 km |
| 3 | DanubeSecond-longest river in Europe | 2,850 km |
| 4 | RhineRiver in Western Europe to the North Sea | 1,233 km |
| 5 | VolgaRiver in Russia; the longest river in Europe | 3,530 km |
| 6 | | 2,525 km |
| 7 | | 3,766 km |
| 8 | | 4,700 km |
| 9 | Yangtze RiverLongest river in Asia and third-longest in the world | 6,300 km |
| 10 | | 3,180 km |
| 11 | | 4,180 km |
| 12 | | 5,464 km |
| 13 | | 2,800 km |
| 14 | | 334 km |
| 15 | | 777 km |
| 16 | TigrisRiver flowing from Turkey through Iraq and Syria | 1,850 km |
| 17 | | 2,285 km |
| 18 | | 252 km |
| 19 | ElbeMajor river in Central Europe | 1,094 km |
| 20 | VistulaRiver in East-Central Europe | 1,047 km |
| 21 | | 4,350 km |
| 22 | Amur RiverMajor river in eastern Russia and northeastern China, with tributaries also in Mongolia | 2,824 km |
| 23 | | 2,900 km |
| 24 | | 4,294 km |
| 25 | ObSecond-longest river in Russia | 3,650 km |
| 26 | | 2,428 km |
| 27 | DonRussian river, fifth-longest river in Europe | 1,870 km |
| 28 | | 3,726 km |
| 29 | LoireLongest river in France | 1,006 km |
| 30 | PoLongest river in Italy | 652 km |
| 31 | OderRiver in Central Europe flowing from the Czech Republic and along the Poland–Germany border | 854 km |
| 32 | RhôneRiver in Switzerland and France | 812 km |
| 33 | | 1,352 km |
| 34 | St. Lawrence RiverMajor river in eastern Canada and the United States, flowing into the Gulf of St. Lawrence | 3,058 km |
| 35 | | 405 km |
| 36 | YeniseiRiver in Asia; the 5th-longest in the world | 3,487 km |
| 37 | | 2,620 km |
| 38 | | 1,007 km |
| 39 | | 2,140 km |
| 40 | | 2,334 km |
| 41 | | 1,376 km |
| 42 | NevaRiver in Russia connecting Lake Ladoga and the Baltic Sea | 75 km |
| 43 | IrtyshRiver in Mongolia, China, Kazakhstan and Russia | 4,248 km |
| 44 | Blue NileRiver originating at Lake Tana in Ethiopia that is a tributary of the Nile River | 1,783 km |
| 45 | DaugavaRiver in Latvia, Belarus and Russia | 1,020 km |
| 46 | MeuseRiver in western Europe | 950 km |
| 47 | Syr DaryaRiver in Kyrgyzstan, Uzbekistan, Tajikistan, Kazakhstan | 2,212 km |
| 48 | Yukon RiverRiver in the Yukon Territory, Canada and Alaska, United States of America | 3,190 km |
| 49 | Columbia RiverRiver in North America; flows from British Columbia, through Washington, and along the Washington-Oregon border to the Pacific Ocean | 2,000 km |
| 50 | | 910 km |
| 51 | | 492 km |
| 52 | Rio GrandeRiver originating in Colorado, flowing south through New Mexico, and forming part of the US-Mexico border along Texas until emptying into the Gulf of Mexico | 3,051 km |
| 53 | | 1,750 km |
| 54 | MainRight tributary of Rhine river in Germany | 524 km |
| 55 | | 897 km |
| 56 | | 1,579 km |
| 57 | | 4,880 km |
| 58 | White NileRiver in Africa and tributary of the Nile River | 2,620 km |
| 59 | | 544 km |
| 60 | | 2,530 km |
| 61 | | 2,200 km |
| 62 | Río de la PlataEstuary formed by the confluence of the Uruguay River and the Paraná River on the border between Argentina and Uruguay | 290 km |
| 63 | | 966 km |
| 64 | | 1,465 km |
| 65 | | 430 km |
| 66 | | 2,170 km |
| 67 | | 502 km |
| 68 | | 1,790 km |
| 69 | | 1,050 km |
| 70 | AngaraRiver in Irkutsk Oblast and Krasnoyarsk Krai, south-east Siberia, Russia | 1,779 km |
| 71 | | 1,130 km |
| 72 | GaronneRiver in southwest France and northern Spain | 647 km |
| 73 | KamaRiver in Russia, tributary to the Volga | 1,805 km |
| 74 | Paraguay RiverRiver in Brazil, Bolivia, Paraguay and Argentina, tributary of the Paraná | 2,621 km |
| 75 | SavaRiver in Southeast Europe | 945 km |
| 76 | | 1,400 km |
| 77 | OkaRiver in Russia, tributary of Volga | 1,500 km |
| 78 | | 2,250 km |
| 79 | Aras RiverRiver located in and along the countries of Turkey, Armenia, Azerbaijan, and Iran | 1,072 km |
| 80 | | 1,360 km |
| 81 | | 1,738 km |
| 82 | | 1,450 km |
| 83 | | 1,809 km |
| 84 | | 657 km |
| 85 | InnRiver in Switzerland, Austria and Germany, a right tributary of the Danube | 517 km |
| 86 | NemanRiver in eastern Europe | 937 km |
| 87 | KolymaRiver in Magadan Oblast and Yakutia, Russia | 2,129 km |
| 88 | | 1,528 km |
| 89 | | 1,600 km |
| 90 | ScheldtRiver in France, Belgium and the Netherlands | 355 km |
| 91 | AdigeRiver in northern Italy | 410 km |
| 92 | NeckarRight tributary of Rhine river in Germany | 362 km |
| 93 | Shatt al-ArabRiver in Southwest Asia, formed by the confluence of the Euphrates and the Tigris in the town of al-Qurnah in the Basra Governorate of southern Iraq | 200 km |
| 94 | | 1,500 km |
| 95 | | 744 km |
| 96 | Ubangi RiverLargest tributary of the Congo River in the region of Central Africa | 1,060 km |
| 97 | | 372 km |
| 98 | | 1,974 km |
| 99 | DravaRiver in Italy, Austria, Slovenia, Croatia and Hungary | 720 km |
| 100 | | 665 km |