| 100% | NILE | 4 | River that splits at Khartoum |
| 52% | OHIO | 4 | River that ends at Cairo |
| 52% | OHIO | 4 | River that starts at Pittsburgh |
| 50% | NILE | 4 | River that Khartoum and Cairo are on |
| 50% | LEA | 3 | River that meets the Thames at London |
| 50% | GILA | 4 | River that meets the Colorado at Yuma |
| 49% | WYRE | 4 | River that flows into Morecambe Bay at Fleetwood |
| 48% | TAFF | 4 | River that flows to the Bristol Channel at Cardiff |
| 48% | TAGUS | 5 | River that flows to the Atlantic at Lisbon, Portugal |
| 48% | WEAR | 4 | River that flows to the North Sea at Sunderland |
| 48% | TEES | 4 | River that flows to the North Sea at Middlesbrough |
| 48% | LIMPOPO | 7 | River that meets the sea at Xai-Xai, Mozambique |
| 48% | TEES | 4 | River that flows into the North Sea at Middlesbrough |
| 48% | ASSINIBOINE | 11 | River that joins the Red River at Winnipeg, Manitoba, Canada |
| 46% | SAONE | 5 | 294 mile river that joins the Rhone at Lyon |
| 46% | NILE | 4 | African river that starts at Lake Victoria |
| 46% | URAL | 4 | Russian river that flows to the Caspian Sea at Guryev |
| 45% | TYNE | 4 | English river that flows to the North Sea at South Shields |
| 45% | SIRET | 5 | 402 mile long Romanian river that meets the Danube at Galati |
| 44% | YSER | 4 | River that rises in France and reaches the North Sea at Belgium's Nieuwpoort |
| 44% | ODER | 4 | 520 mile river that connects to the Gliwice Canal at Koz le |
| 44% | FAL | 3 | River in Cornwall that reaches the English Channel at Falmouth |
| 44% | ORWELL | 6 | River in Suffolk that broadens into an estuary at Ipswich |
| 44% | SAONE | 5 | River in E France that joins the Rhone at Lyon |
| 43% | ORB | 3 | Beziers' 84 mile long river that flows into the Mediterranean at Valras-Plage |
| 43% | YARE | 4 | River in Norfolk that joins the River Chet at Hardley Cross |
| 43% | UGIE | 4 | River in Scotland that flows to the North Sea at Peterhead |
| 43% | DART | 4 | River in Devon that flows into the English Channel at Dartmouth |
| 43% | SAVA | 4 | River rising in Slovenia that flows to the Danube at Belgrade |
| 43% | WESER | 5 | River in Germany that flows to the North Sea at Bremerhaven |