| Length | River | % Correct |
|---|---|---|
| 2,202 mi/3,544 km | Mississippi River | 98%
|
| 2,341 mi/3,768 km | Missouri River | 98%
|
| 979 mi/1,575 km | Ohio River | 95%
|
| 1,450 mi/2,330 km | Colorado River | 94%
|
| 935 mi/1,504 km | Tennessee River | 84%
|
| 1,443 mi/2,322 km | Arkansas River | 83%
|
| 259 mi/417 km | Kentucky River | 78%
|
| 301 mi/484 km | Delaware River | 76%
|
| 318 mi/512 km | Alabama River | 74%
|
| 148 mi/238 km | Kansas River | 74%
|
| 323 mi/520 km | Iowa River | 73%
|
| 273 mi/439 km | Illinois River | 72%
|
| 410 mi/660 km | Connecticut River | 62%
|
| 420 mi/680 km | Wisconsin River | 62%
|
| 370 mi/595 km | Minnesota River | 59%
|