United Kingdom
total: 360 km
border countries: Ireland 360 km
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
Uruguay
total: 1,648 km
border countries: Argentina 580 km, Brazil 1,068 km
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
Vanuatu
0 km
Venezuela
total: 4,993 km
border countries: Brazil 2,200 km, Colombia 2,050 km, Guyana 743 km
Vietnam
total: 4,639 km
border countries: Cambodia 1,228 km, China 1,281 km, Laos 2,130 km
Virgin Islands
0 km
Wake Island
0 km