List of countries that border only one other country

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This is a list of countries that have a land border with only one other country. Some on this list have a maritime border with additional countries: for example Denmark "borders" by sea Sweden, Norway and Canada (between Greenland and Baffin Island); while, in addition to Denmark, Canada also has a sea boundary with France (between the island of Newfoundland and the territory of St. Pierre and Miquelon). Some countries, which are not listed here, have no land border but do have a maritime border with a single other country, such as Sri Lanka.

There are generally four arrangements by which a country would have a single land border:

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 maritime 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.

Often called fixed crossings or fixed links, transportation corridors constructed to cross bodies of water without any intermittent connections such as ferries or ships may be between different states. These may be considered artificial "persistent" borderpoints for land vehicles or pedestrians, but are not typically considered land borders given their need for continuous operation and maintenance, as well as their ease of volume control or closure by either state.

Has a land border and an additional artificial borderpoint
Has no land border, but has an artificial borderpoint

Dependent territories[edit]

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


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]


  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.


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