| Border length | Country | Bordering Country | % Correct |
|---|---|---|---|
| 8,893 km | Canada | 94%
| |
| United States | 90%
| ||
| 360 km | Ireland | 89%
| |
| Italy | 89%
| ||
| 360 km | United Kingdom | 89%
| |
| 3.2 km | Vatican City | 89%
| |
| 360 km | Haiti | 86%
| |
| 909 km | Lesotho | 86%
| |
| 238 km | South Korea | 86%
| |
| 360 km | Dominican Republic | 85%
| |
| Indonesia | 85%
| ||
| 39 km | San Marino | 85%
| |
| South Africa | 85%
| ||
| 1,214 km | Portugal | 83%
| |
| Spain | 81%
| ||
| North Korea | 79%
| ||
| 820 km | Papua New Guinea | 78%
| |
| 228 km | East Timor | 76%
| |
| 68 km | Denmark | 75%
| |
| Malaysia | 75%
| ||
| 4.4 km | Monaco | 75%
| |
| France | . | 72%
| |
| 381 km | Brunei | 71%
| |
| Germany | 69%
| ||
| Senegal | 65%
| ||
| 740 km | The Gambia | 64%
| |
| 60 km | Qatar | 57%
| |
| Saudi Arabia | 54%
|