| Bordering States | State |
| Oregon, Nevada, Arizona | |
| Alabama, Tennessee, North Carolina, South Carolina, Florida | |
| Rhode Island, Massachusetts, New York | |
| Minnesota, Michigan, Illinois, Iowa | |
| New Mexico, Oklahoma, Arkansas, Louisiana | |
| New Hampshire | |
| Montana, Minnesota, South Dakota | |
| Oregon, Washington, Montana, Wyoming, Utah, Nevada | |
| Vermont, Maine, Massachusetts | |
| Canada, Pacific Ocean | |
| Idaho, Wyoming, South Dakota, North Dakota | |
| | Bordering States | State |
| Illinois, Michigan, Ohio, Kentucky | |
| Kentucky, Ohio, Pennsylvania, Maryland, Virginia | |
| Alabama, Georgia | |
| Oregon, Idaho | |
| Utah, Wyoming, Nebraska, Kanas, Oklahoma, New Mexico, Arizona | |
| West Virginia, Maryland, North Carolina, Tennessee, Kentucky | |
| Texas, Arkansas, Mississippi | |
| New York, Connecticut, Rhode Island, Vermont, New Hampshire | |
| Nebraska, South Dakota, Minnesota, Wisconsin, Illinois, Missouri | |
| ...water | |
|