| Length | Country | Longest Border | % Correct |
|---|---|---|---|
| 1206 km | Tajikistan | Afghanistan | 100%
|
| 2511 km | Dem. Rep. of the Congo | Angola | 100%
|
| 5308 km | Chile | Argentina | 100%
|
| 1880 km | Paraguay | Argentina | 100%
|
| 787 km | Armenia | Azerbaijan | 100%
|
| 4053 km | India | Bangladesh | 100%
|
| 148 km | Luxembourg | Belgium | 100%
|
| 3400 km | Brazil | Bolivia | 100%
|
| 932 km | Croatia | Bosnia and Herzegovina | 100%
|
| 1544 km | Namibia | Botswana | 100%
|
| 1840 km | South Africa | Botswana | 100%
|
| 3400 km | Bolivia | Brazil | 100%
|
| 1308 km | Guyana | Brazil | 100%
|
| 1560 km | Peru | Brazil | 100%
|
| 985 km | Uruguay | Brazil | 100%
|
| 2200 km | Venezuela | Brazil | 100%
|
| 494 km | Greece | Bulgaria | 100%
|
| 290 km | Rwanda | Burundi | 100%
|
| 8893 km | United States | Canada | 100%
|
| 2185 km | Myanmar | China | 100%
|
| 1416 km | North Korea | China | 100%
|
| 815 km | Germany | Czechia | 100%
|
| 2511km | Angola | Dem. Rep. of the Congo | 100%
|
| 1747 km | Central African Republic | Dem. Rep. of the Congo | 100%
|
| 2410 km | Rep. of the Congo | Dem. Rep. of the Congo | 100%
|
| 877 km | Uganda | Dem. Rep. of the Congo | 100%
|
| 360 km | Haiti | Dominican Republic | 100%
|
| 1115 km | Libya | Egypt | 100%
|
| 390 km | Djibouti | Ethiopia | 100%
|
| 912 km | Eritrea | Ethiopia | 100%
|
| 4 km | Monaco | France | 100%
|
| 350 km | Equatorial Guinea | Gabon | 100%
|
| 68 km | Denmark | Germany | 100%
|
| 577 km | Netherlands | Germany | 100%
|
| 877 km | Togo | Ghana | 100%
|
| 212 km | Albania | Greece | 100%
|
| 247 km | North Macedonia | Greece | 100%
|
| 600 km | Suriname | Guyana | 100%
|
| 922 km | Nicaragua | Honduras | 100%
|
| 679 km | Slovakia | Hungary | 100%
|
| 4053 km | Bangladesh | India | 100%
|
| 659 km | Bhutan | India | 100%
|
| 2912 km | Pakistan | India | 100%
|
| 253 km | East Timor | Indonesia | 100%
|
| 1782 km | Malaysia | Indonesia | 100%
|
| 820 km | Papua New Guinea | Indonesia | 100%
|
| 1458 km | Iraq | Iran | 100%
|
| 254 km | Kuwait | Iraq | 100%
|
| 499 km | United Kingdom | Ireland | 100%
|
| 39 km | San Marino | Italy | 100%
|
| 455 km | Israel | Jordan | 100%
|
| 6846 km | Russia | Kazakhstan | 100%
|
| 2203 km | Uzbekistan | Kazakhstan | 100%
|
| 769 km | Tanzania | Kenya | 100%
|
| 2130 km | Vietnam | Laos | 100%
|
| 333 km | Estonia | Latvia | 100%
|
| 1782 km | Indonesia | Malaysia | 100%
|
| 2237 km | Mauritania | Mali | 100%
|
| 2237 km | Mali | Mauritania | 100%
|
| 813 km | Senegal | Mauritania | 100%
|
| 276 km | Belize | Mexico | 100%
|
| 958 km | Guatemala | Mexico | 100%
|
| 4677 km | China | Mongolia | 100%
|
| 1569 km | Malawi | Mozambique | 100%
|
| 1800 km | Thailand | Myanmar | 100%
|
| 940 km | Honduras | Nicaragua | 100%
|
| 1975 km
| Cameroon | Nigeria | 100%
|
| 1497 km | Niger | Nigeria | 100%
|
| 238 km | South Korea | North Korea | 100%
|
| 2430 km | Afghanistan | Pakistan | 100%
|
| 1214 km | Spain | Portugal | 100%
|
| 2567 km | Gabon | Rep. of the Congo | 100%
|
| 609 km | Bulgaria | Romania | 100%
|
| 546 km | Serbia | Romania | 100%
|
| 6846 km | Kazakhstan | Russia | 100%
|
| 1576 km | Ukraine | Russia | 100%
|
| 731 km | Jordan | Saudi Arabia | 100%
|
| 676 km | Oman | Saudi Arabia | 100%
|
| 60 km | Qatar | Saudi Arabia | 100%
|
| 457 km | United Arab Emirates | Saudi Arabia | 100%
|
| 749 km
| Gambia | Senegal | 100%
|
| 380 km | Kosovo | Serbia | 100%
|
| 225 km | Montenegro | Serbia | 100%
|
| 679 km | Hungary | Slovakia | 100%
|
| 1640 km | Ethiopia | Somalia | 100%
|
| 1969 km | Botswana | South Africa | 100%
|
| 909 km | Lesotho | South Africa | 100%
|
| 430 km | Eswatini | South africa | 100%
|
| 1937 km | Sudan | South Sudan | 100%
|
| 623 km | France (European part) | Spain | 100%
|
| 1214 km | Portugal | Spain | 100%
|
| 1273 km | Egypt | Sudan | 100%
|
| 1937 km | South Sudan | Sudan | 100%
|
| 41 km | Liechtenstein | Switzerland | 100%
|
| 375 km | Lebanon | Syria | 100%
|
| 822 km | Turkey | Syria | 100%
|
| 1098 km | Ghana | Togo | 100%
|
| 822 km | Syria | Turkey | 100%
|
| 939 km | Moldova | Ukraine | 100%
|
| 499 km | Ireland | United Kingdom | 100%
|
| 3141 km | Mexico | United States | 100%
|
| 1621 km | Turkmenistan | Uzbekistan | 100%
|
| 1158 km | Cambodia | Vietnam | 100%
|
| 2130 km | Laos | Vietnam | 100%
|
| 1458 km | Saudi Arabia | Yemen | 100%
|
| 816 km | Ivory Coast | Guinea | 50%
|
| 716 km | Liberia | Ivory Coast | 50%
|
| 1314 km | Kyrgyzstan | Uzbekistan | 50%
|
| 1600 km | Morocco | Algeria | 0%
|
| 965 km | Tunisia | Algeria | 0%
|
| 680 km | Lithuania | Belarus | 0%
|
| 608 km | Romania | Bulgaria | 0%
|
| 1690 km | Nigeria | Cameroon | 0%
|
| 1556 km | Chad | Central African Republic | 0%
|
| 5308 km | Argentina | Chile | 0%
|
| 4677 km | Mongolia | China | 0%
|
| 330 km | Panama | Costa Rica | 0%
|
| 932 km | Bosnia and Herzegovina | Croatia | 0%
|
| 455 km | Slovenia | Croatia | 0%
|
| 790 km | Poland | Czechia | 0%
|
| 1930 km | Zambia | Dem. Rep. of the Congo | 0%
|
| 867 km | Kenya | Ethiopia | 0%
|
| 1640 km | Somalia | Ethiopia | 0%
|
| 620 km | Belgium | France | 0%
|
| 784 km | Austria | Germany | 0%
|
| 421 km | Guinea-Bissau | Guinea | 0%
|
| 652 km | Sierra Leone | Guinea | 0%
|
| 360 km | Dominican Republic | Haiti | 0%
|
| 391 km | El Salvador | Honduras | 0%
|
| 1690 km | Nepal | India | 0%
|
| 700 km | Azerbaijan | Iran | 0%
|
1458 km
| Iran | Iraq | 0%
|
| 740 km | Switzerland | Italy | 0%
|
| 3 km | Vatican City | Italy | 0%
|
| 453 km | Latvia | Lithuania | 0%
|
| 1569 km | Mozambique | Malawi | 0%
|
| 381 km | Brunei | Malaysia | 0%
|
| 1000 km | Burkina Faso | Mali | 0%
|
| 1062 km | Guinea | Mali | 0%
|
| 1559 km | Algeria | Morocco | 0%
|
| 1231 km | Zimbabwe | Mozambique | 0%
|
| 809 km | Benin | Nigeria | 0%
|
| 1619 km | Sweden | Norway | 0%
|
| 330 km | Costa Rica | Panama | 0%
|
| 1420 km | Ecuador | Peru | 0%
|
| 1312 km | Belarus | Russia | 0%
|
| 1340 km | Finland | Russia | 0%
|
| 723 km | Georgia | Russia | 0%
|
| 1458 km | Yemen | Saudi Arabia | 0%
|
| 64 km | Andorra | Spain | 0%
|
| 1619 km | Norway | Sweden | 0%
|
| 740 km | Italy | Switzerland | 0%
|
| 589 km | Burundi | Tanzania | 0%
|
| 8893 km | Canada | United States | 0%
|
| 2050 km | Colombia | Venezuela | 0%
|