| 100% | IOWA | 4 | It borders both the Missouri and the Mississippi rivers |
| 71% | IOWA | 4 | The Mississippi and Missouri rivers form parts of its border |
| 64% | IOWA | 4 | It's sandwiched between the Mississippi and Missouri rivers |
| 60% | IOWA | 4 | State sandwiched between the Missouri and the Mississippi rivers |
| 57% | IOWA | 4 | It's between the Missouri and Mississippi |
| 55% | IOWA | 4 | The Mississippi River forms its eastern border |
| 46% | BUG | 3 | Tributary of the Narew River forming part of Poland's border with both Belarus and Ukraine |
| 45% | STL | 3 | Missouri city on the Mississippi River: Abbr. |
| 43% | ASIA | 4 | It borders the Arctic, Pacific, and Indian Oceans |
| 43% | IOWA | 4 | The Mississippi forms its eastern border |
| 43% | ERIE | 4 | Lake that borders both the United States and Canada |
| 43% | ATLANTICOCEAN | 13 | It borders the U.S. and Portugal: 2 wds. |
| 43% | NEB | 3 | The Missouri R. forms its eastern border |
| 42% | STLOUIS | 7 | Port on the Mississippi River; largest city in Missouri, US |
| 42% | STLOUIS | 7 | US port on the Mississippi River; largest city in Missouri |
| 42% | IOWA | 4 | State whose eastern border is formed by the Mississippi River |
| 42% | RAFT | 4 | Transportation used by Huck and Jim down the Mississippi River |
| 42% | TENN | 4 | The Mississippi R. makes up its western border |
| 42% | IOWA | 4 | State between Missouri and Mississippi rivers |
| 42% | IOWA | 4 | State between Missouri and Mississippi River |
| 42% | SLU | 3 | Missouri school that is the oldest college west of the Mississippi River (Abbr.) |
| 41% | PERU | 4 | The Putumayo River forms part of its northern border |
| 41% | IOWA | 4 | The Big Sioux River forms part of its border |
| 41% | OMAHA | 5 | Where the Platte and Missouri Rivers meet |
| 41% | AIDA | 4 | Its roles include the kings of both Egypt and Ethiopia |
| 40% | IRAN | 4 | It borders the Caspian Sea, Persian Gulf, and Gulf of Oman |
| 40% | ERIE | 4 | Lake that borders both Canada and the United States |
| 40% | NOVASCOTIA | 10 | It lies between the Bay of Fundy and the Saint Lawrence River |
| 39% | GUADIANA | 8 | River on the border between Spain and Portugal |
| 39% | YELLOWSTONE | 11 | US river rising in NW Wyoming that enters the Missouri near the North Dakota border |