| State borders | River |
| South Dakota, Nebraska, Iowa, Missouri, Kansas | |
| Georgia, South Carolina | |
| Maryland, Virginia, Washington, D.C., West Virginia | |
| Michigan (Upper Peninsula), Wisconsin | |
| Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana | |
| Idaho, Washington, Oregon | |
| Kentucky, Tennessee, Mississippi, Alabama | |
| | State borders | River |
| Arizona, Nevada, California | |
| Texas, Oklahoma, Arkansas | |
| Alabama, Georgia | |
| Illinois, Indiana, Ohio, Kentucky, West Virginia | |
| New York, Pennsylvania, New Jersey, Delaware | |
| New Mexico, Texas | |
|