List of countries that border only one other country

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This is the list of countries that border only one other country, with only land borders being counted. Some of these countries have several neighbours "across the sea". As an example Denmark "borders" Sweden and Norway by sea, and Canada has sea boundaries with Denmark (between Baffin Island and Greenland) and France (between the island of Newfoundland and the territory of St. Pierre and Miquelon). Other countries may only border one other country by sea, such as Sri Lanka.

Territory leased or ceded by one country to another for perpetual use, but not in sovereignty, such as Guantanamo Bay Naval Base in Cuba, or memorials, such as the American Cemetery in France, do not constitute true territorial borders, because the land occupied remains a formal part of the host country.

Countries bordering only one other country[edit]

Country Neighbour Border length (km) Notes
 Brunei  Malaysia 381 Borders the Malaysian state of Sarawak on the island of Borneo.
 Canada  United States 8,893 The border around the area of Hans Island between Canada and Greenland (a constituent country of the Kingdom of Denmark) is disputed and undefined. Canada also shares a small maritime border with the French overseas collectivity of Saint Pierre and Miquelon.
 Cyprus  Akrotiri and Dhekelia (UK) The island of Cyprus is de jure divided between the Republic of Cyprus and the British overseas territory of Akrotiri and Dhekelia. De facto, however, the northern third of the island is controlled by the Turkish Republic of Northern Cyprus, separated from the Republic of Cyprus by a United Nations buffer zone.
 Denmark  Germany 68 Denmark is connected to Sweden via the Øresund Bridge.
 Dominican Republic  Haiti 360 On the island of Hispaniola.
 The Gambia  Senegal 740 The Republic of the Gambia is bordered north, south and east by Senegal.
 Haiti  Dominican Republic 360 On the island of Hispaniola.
 Ireland  United Kingdom 360 The Republic of Ireland borders Northern Ireland, a constituent country of the United Kingdom, on the island of Ireland.
 Lesotho  South Africa 909 Lesotho is an enclave which is entirely surrounded by South Africa.
 Monaco  France 4.4
 Papua New Guinea  Indonesia 820 On the island of New Guinea.
 Portugal  Spain 1,214
 Qatar  Saudi Arabia 60 The planned Qatar–Bahrain Friendship Bridge would connect Qatar to Bahrain.
 San Marino  Italy 39 San Marino is an enclave entirely surrounded by Italy.
 South Korea  North Korea 238 On the Korean Peninsula, at the Demarcation Line. The two countries are separated by a 4 km wide Demilitarized Zone.
 Timor-Leste  Indonesia 228 On the island of Timor.
 United Kingdom  Ireland 360 On the island of Ireland. The British Overseas Territories of Gibraltar and Akrotiri and Dhekelia border Spain and Cyprus respectively, but these territories are not part of the United Kingdom proper (see #Dependent territories section).
  Vatican City  Italy 3.2 The Vatican is an enclave entirely surrounded by Italy.

Causeways, bridges, and tunnels[edit]

Borders relevant to this list may arguably include short theoretical borders in the middle of man-made constructions. Also, artificial islands or causeways could be disputed.[citation needed]

Dependent territories[edit]

In some cases, a dependent territory of one nation borders another nation.

Historical[edit]

There were many countries that historically had only one neighbour. Some no longer exist while others now have either no land borders or borders with more than one nation due to border changes.

References[edit]

See also[edit]