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, such as Sri Lanka, border only one other country by sea.

There are generally three possible arrangements by which a country can have a single border. The first is with a divided island such a Haiti and the Dominican Republic, or Ireland and the United Kingdom. The second is a peninsular relationship, where the first country borders the second and is otherwise surrounded by sea, while the second country borders other countries, as with Portugal and Spain, Denmark and Germany, or Canada and the United States. The third is the circumstance where the first country is a small country that is landlocked and completely surrounded by the second, larger country, as with The Vatican and Italy, or Lesotho and South Africa.

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.

This list is based on the Correlates of War Direct Contiguity data set, with causeways and bridges not being counted. [1]

Countries bordering only one other country[edit]

Country Neighbour Border length (km) Border length (mi) Notes
 Brunei  Malaysia 381 237 [A]
 Canada  United States 8,893 5,526 [B]
 Denmark  Germany 68 42 [C]
 Dominican Republic  Haiti 360 220 [D]
 The Gambia  Senegal 740 460 [E]
 Haiti  Dominican Republic 360 220 [D]
 Ireland  United Kingdom 360 220 [F]
 Lesotho  South Africa 909 565 [G]
 Monaco  France 4.4 2.7
 Papua New Guinea  Indonesia 820 510 [H]
 Portugal  Spain 1,214 754
 Qatar  Saudi Arabia 60 37 [I]
 San Marino  Italy 39 24 [J]
 South Korea  North Korea 238 148 [K]
 Timor-Leste  Indonesia 228 142 [L]
 United Kingdom  Ireland 360 220 [M]
  Vatican City  Italy 3.2 2.0 [N]

Causeways, bridges, and tunnels[edit]

Passport Island, site of the land border between Bahrain and Saudi Arabia, is seen at the far left. Each nation has a border checkpoint on the island on opposite sides of the border.

Borders relevant to this list may include short borders in the middle of man-made constructions.

Has a land border, and a second artificial border
Has no land border, but an artificial border

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.

See also[edit]

Notes[edit]

  1. ^ Borders the Malaysian state of Sarawak on the island of Borneo.
  2. ^ 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.
  3. ^ Since 1999, Denmark is connected to Sweden via the Øresund Bridge, which was opened in the year 2000.
  4. ^ a b On the island of Hispaniola.
  5. ^ The Republic of the Gambia is bordered north, south and east by Senegal.
  6. ^ The Republic of Ireland borders Northern Ireland, a constituent country of the United Kingdom, on the island of Ireland.
  7. ^ Lesotho is an enclave which is entirely surrounded by South Africa.
  8. ^ On the island of New Guinea.
  9. ^ The planned Qatar–Bahrain Friendship Bridge would connect Qatar to Bahrain.
  10. ^ San Marino is an enclave entirely surrounded by Italy.
  11. ^ On the Korean Peninsula, at the Demarcation Line. The two countries are separated by a 4 km wide Demilitarized Zone.
  12. ^ On the island of Timor.
  13. ^ 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).
  14. ^ The Vatican is an enclave entirely surrounded by Italy.

References[edit]

  1. ^ "Direct Contiguity Data, 1816-2016. Version 3.2". Correlates of War Project. Retrieved 12 December 2017.