| 100% | TEES | 4 | River that flows into the North Sea at Middlesbrough |
| 86% | TEES | 4 | River that flows to the North Sea at Middlesbrough |
| 72% | WEAR | 4 | River that flows to the North Sea at Sunderland |
| 69% | TYNE | 4 | English river that flows to the North Sea at South Shields |
| 66% | UGIE | 4 | River in Scotland that flows to the North Sea at Peterhead |
| 66% | WESER | 5 | River in Germany that flows to the North Sea at Bremerhaven |
| 66% | TEES | 4 | River that flows through Middlesbrough to the North Sea |
| 65% | YSER | 4 | River rising in northern France that flows through Belgium into the North Sea at Nieuwpoort |
| 64% | ELBE | 4 | River in central Europe that flows to the North Sea at Hamburg |
| 64% | EMS | 3 | River rising in NW Germany that flows into the North Sea near Emden |
| 64% | TYNE | 4 | River in N England that flows to the North Sea at South Shields |
| 58% | ORB | 3 | Beziers' 84 mile long river that flows into the Mediterranean at Valras-Plage |
| 58% | ELBE | 4 | Hamburg's river which flows into the North Sea |
| 58% | DANUBE | 6 | Major European river that flows into the Black Sea |
| 58% | AVE | 3 | 52 mile long Portuguese river that flows into the Atlantic at Vila do Conde |
| 57% | URAL | 4 | Russian river that flows to the Caspian Sea at Guryev |
| 55% | MURRAY | 6 | River rising in New South Wales, Australia, that flows into the sea at Encounter Bay |
| 55% | ELBE | 4 | 380 mile central European river that flows to the North Sea |
| 54% | DART | 4 | River in Devon that flows into the English Channel at Dartmouth |
| 53% | STOUR | 5 | River in Kent that flows into the English Channel at Pegwell Bay |
| 53% | VOLGA | 5 | Longest river in Europe that flows into the Caspian Sea |
| 53% | RHEIN | 5 | It flows into the North Sea |
| 52% | OSAGE | 5 | River that flows into the Lake of the Ozarks |
| 52% | CASPIAN | 7 | Sea that the River Volga flows into |
| 52% | CHERWELL | 8 | Oxfordshire river that flows into the Thames |
| 52% | PARNAIBA | 8 | Brazilian river that flows into the Atlantic Ocean |
| 52% | AAR | 3 | Swiss river that flows into the Rhine (Var.) |
| 51% | ILLER | 5 | River that flows into the Danube in the center of Ulm |
| 51% | OUSE | 4 | 143 mi. British river that flows into the Wash |
| 51% | DON | 3 | River that rises in the Cairngorm Mountains before flowing east to the North Sea |