| State | Longest Border | % Correct |
|---|---|---|
| Arizona | New Mexico | 100%
|
| Alabama | Mississippi | 97%
|
| California | Nevada | 97%
|
| Georgia | Alabama | 92%
|
| Florida | Georgia | 92%
|
| Illinois | Indiana | 90%
|
| Idaho | Montana | 90%
|
| Colorado | Wyoming | 90%
|
| Indiana | Illinois | 89%
|
| Delaware | Maryland | 89%
|
| Connecticut | Massachusetts | 89%
|
| Maine | New Hampshire | 89%
|
| Kentucky | Tennessee | 89%
|
| New Hampshire | Vermont | 88%
|
| Louisiana | Mississippi | 86%
|
| Arkansas | Missouri | 86%
|
| Kansas | Oklahoma | 85%
|
| Maryland | Pennsylvania | 85%
|
| Nevada | California | 83%
|
| New Mexico | Texas | 83%
|
| New Jersey | Pennsylvania | 82%
|
| Mississippi | Louisiana | 81%
|
| Michigan | Wisconsin | 81%
|
| Montana | Idaho | 79%
|
| Massachusetts | New Hampshire | 79%
|
| Minnesota | North Dakota | 79%
|
| New York | Pennsylvania | 79%
|
| North Carolina | South Carolina | 79%
|
| Iowa | Minnesota | 78%
|
| Nebraska | South Dakota | 78%
|
| Oklahoma | Texas | 76%
|
| Oregon | Washington | 76%
|
| North Dakota | Minnesota | 75%
|
| Pennsylvania | New York | 74%
|
| South Carolina | Georgia | 72%
|
| Rhode Island | Massachusetts | 72%
|
| Tennessee | Kentucky | 71%
|
| Vermont | New Hampshire | 68%
|
| Texas | Oklahoma | 68%
|
| Missouri | Illinois | 65%
|
| South Dakota | Nebraska | 64%
|
| Utah | Nevada | 64%
|
| Virginia | West Virginia | 64%
|
| Washington | Oregon | 63%
|
| Ohio | West Virginia | 63%
|
| West Virginia | Virginia | 61%
|
| Wisconsin | Minnesota | 56%
|
| Wyoming | Montana | 50%
|