other countries

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 three arrangements by which a country would have a single land border:

an island divided between two states, such as between Haiti and the Dominican Republic, or between Ireland and the United Kingdom
a peninsula or a semi-enclave, where one country has a land border with a neighbouring one but is otherwise surrounded by sea, while the neighbour borders other countries—examples include Portugal (neighbouring Spain), Denmark (neighbouring Germany), and Canada (neighbouring the United States)
a country forming a landlocked true enclave is completely surrounded by a larger country, such as The Vatican (within Italy) and Lesotho (within 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 maritime causeways and bridges not being counted.

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