| 100% | KAMA | 4 | Tributary of the Volga River upon which Perm and Solikamsk stand |
| 63% | KAMA | 4 | Russian river upon which the cities of Perm and Solikamsk stand |
| 59% | WHARFE | 6 | Tributary of the River Ouse in West and North Yorkshire upon which Ilkley stands |
| 54% | DERWENT | 7 | Tributary of the River Trent upon which Derby stands |
| 52% | VYATKA | 6 | River in Russia, a tributary of the Kama River upon which Kotelnich stands |
| 52% | KUBAN | 5 | Russian river upon which the cities of Armavir and Temryuk, Krasnodar Krai, stand |
| 49% | VITIM | 5 | Russian river, a tributary of the Lena, upon which Bodaybo, Irkutsk, stands |
| 49% | PLATTE | 6 | — River, tributary of the Missouri in Nebraska, US, upon which Fremont stands |
| 48% | PLATTE | 6 | — River, tributary of the Missouri in Nebraska, US, upon which Lexington and Fremont stand |
| 41% | WABASH | 6 | River of the US upon which Terre Haute, Indiana, stands |
| 40% | GARONNE | 7 | River upon which Toulouse and Bordeaux, France, stand |
| 39% | RHINE | 5 | European river upon which Basel, Strasbourg and Cologne stand |
| 37% | BUG | 3 | Tributary of the Narew River forming part of Poland's border with Belarus and Ukraine |
| 37% | BUG | 3 | Tributary of the Narew River forming part of Poland's border with both Belarus and Ukraine |
| 36% | WURM | 4 | River in Germany upon which Aachen and Geilenkirchen stand |
| 35% | KASAI | 5 | Tributary of the Congo River that forms part of the border between the Democratic Republic of the Congo and Angola |
| 35% | EDER | 4 | River in central Germany upon which Felsberg and Fritzlar stand |
| 35% | LOSSIE | 6 | River in NE Scotland upon which Kellas and Dallas stand |
| 34% | LUALABA | 7 | River of the eastern Democratic Republic of the Congo on which Ankoro stands |
| 34% | GUANABARABAY | 12 | Deep inlet of the Atlantic Ocean upon which Rio de Janeiro, Brazil, stands |
| 34% | OSAGE | 5 | — River, tributary of the Missouri River, US, which flows into the Lake of the Ozarks reservoir |
| 34% | TRENT | 5 | River upon which Nottingham stands |
| 34% | WENSUM | 6 | River upon which Norwich stands |
| 34% | TIBER | 5 | River upon which Rome stands |
| 34% | THAMES | 6 | River upon which London stands |
| 34% | MARNE | 5 | Tributary of the river Seine |
| 34% | GILA | 4 | Tributary of the Colorado River |
| 34% | EBOLA | 5 | Tributary of the Congo River |
| 34% | OSAGE | 5 | Tributary of the Missouri River |
| 33% | TONE | 4 | River upon which Taunton, Somerset, stands |