| 100% | SAL | 3 | 482 mi. long river that flows into the Don and rises near the city of Elista in Kalmykia, Russia |
| 44% | OISE | 4 | 212 mi. river that flows into the Seine in the suburbs of Paris |
| 42% | EMS | 3 | River rising in NW Germany that flows into the North Sea near Emden |
| 40% | DNIEPER | 7 | River rising in Russia near Smolensk that flows south to the Black Sea |
| 39% | ILLER | 5 | River that flows into the Danube in the center of Ulm |
| 38% | MOISIE | 6 | River in Quebec, Canada, that flows into the St Lawrence River near Sept-Iles |
| 38% | ABRA | 4 | 111 mile long river in the Philippines originating near Mount Data and flowing into the South China Sea |
| 37% | MURRAY | 6 | River rising in New South Wales, Australia, that flows into the sea at Encounter Bay |
| 37% | RANCE | 5 | River in NW France that flows into the English Channel between Dinard and Saint-Malo |
| 36% | VOLGA | 5 | Longest river in Europe that flows into the Caspian Sea |
| 36% | OSAGE | 5 | — River, tributary of the Missouri River in the US that flows into the Lake of the Ozarks reservoir |
| 36% | GODAVARI | 8 | River rising in Maharashtra, India sacred to Hindus that flows to the Bay of Bengal |
| 35% | YSER | 4 | 48 mi. Belgian river that rises in French Flanders and reaches the North Sea at Nieuwpoort |
| 35% | OMSK | 4 | City in Russia at the confluence of the Om and Irtysh Rivers |
| 35% | ELDE | 4 | 140 mi. German river that flows out of the Plauer See and joins the Elbe at Domitz |
| 35% | LENA | 4 | River in Russia that rises in Siberia before flowing to the Laptev Sea |
| 35% | OUSE | 4 | 143 mi. British river that flows into the Wash |
| 35% | OSAGE | 5 | River that flows into the Lake of the Ozarks |
| 35% | ILMEN | 5 | Lake —, body of water in NW Russia that drains through the Volkhov River into Lake Ladoga |
| 35% | ILMEN | 5 | Lake —, body of water in northwest Russia that drains through the Volkhov River into Lake Ladoga |
| 35% | ILMEN | 5 | Lake —, body of water in northwest Russia that drains into Lake Ladoga through the Volkhov River |
| 35% | NILE | 4 | One of the longest rivers in the world that flows through Egypt |
| 34% | YSER | 4 | River rising in northern France that flows through Belgium into the North Sea at Nieuwpoort |
| 34% | ORB | 3 | Beziers' 84 mile long river that flows into the Mediterranean at Valras-Plage |
| 34% | ARUWIMI | 7 | River in NE Democratic Republic of the Congo that rises near Lake Albert as the Ituri |
| 34% | ARUWIMI | 7 | River in northeast Democratic Republic of the Congo that rises near Lake Albert as the Ituri |
| 34% | ARUWIMI | 7 | River in the NE Democratic Republic of Congo that rises near Lake Albert as the Ituri |
| 34% | SUWANNEE | 8 | US river rising in the Okefenokee Swamp on the Georgia-Florida border that flows to the Gulf of Mexico |
| 34% | UBANGI | 6 | River that flows through the city of Bangui |
| 34% | HUELVA | 6 | City in SW Spain near the Portuguese border at the confluence of the Odiel and Tinto Rivers |