| Rank | Country | Land boundaries |
| Tonga | 0 km |
| Trinidad and Tobago | 0 km |
107 | Tunisia | total: 1,424 km
border countries: Algeria 965 km, Libya 459 km |
69 | Turkey | total: 2,648 km
border countries: Armenia 268 km, Azerbaijan 9 km, Bulgaria 240 km, Georgia 252 km, Greece 206 km, Iran 499 km, Iraq 352 km, Syria 822 km |
49 | Turkmenistan | total: 3,736 km
border countries: Afghanistan 744 km, Iran 992 km, Kazakhstan 379 km, Uzbekistan 1,621 km |
| Turks and Caicos Islands | 0 km |
| Tuvalu | 0 km |
65 | Uganda | total: 2,698 km
border countries: Democratic Republic of the Congo 765 km, Kenya 933 km, Rwanda 169 km, Sudan 435 km, Tanzania 396 km |
35 | Ukraine | total: 4,663 km
border countries: Belarus 891 km, Hungary 103 km, Moldova 939 km, Poland 526 km, Romania (south) 169 km, Romania (west) 362 km, Russia 1,576 km, Slovakia 97 km |
124 | United Arab Emirates | total: 867 km
border countries: Oman 410 km, Saudi Arabia 457 km |
147 | United Kingdom | total: 360 km
border countries: Ireland 360 km |
5 | United States | total: 12,034 km
border countries: Canada 8,893 km (including 2,477 km with Alaska), Mexico 3,141 km
note: US Naval Base at Guantanamo Bay, Cuba is leased by the US and is part of Cuba; the base boundary is 28 km |
| United States Pacific Island Wildlife Refuges | none |
97 | Uruguay | total: 1,648 km
border countries: Argentina 580 km, Brazil 1,068 km |
19 | Uzbekistan | total: 6,221 km
border countries: Afghanistan 137 km, Kazakhstan 2,203 km, Kyrgyzstan 1,099 km, Tajikistan 1,161 km, Turkmenistan 1,621 km |
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This page was last updated on 4 May, 2008 |
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