A landlocked country is commonly defined as one enclosed or nearly enclosed by land.[1][2][3][4] As of 2008, there are 43 landlocked countries in the world.
A sea that is almost landlocked is connected to the oceans by a strait only, such as the Baltic Sea, the Mediterranean Sea, and the Black Sea. This may be of strategic importance, with one or two other countries controlling the entrance, and/or be relevant for tides and freshwater content.
An island country can be conversely considered waterlocked[5] as it is entirely surrounded by water. In such cases, one must cross water to reach land abroad.
Historically, being landlocked was regarded as a disadvantageous position. It cuts the country off from sea resources such as fishing, but more importantly cuts off access to seaborne trade which, even today, makes up a large percentage of international trade. Around the world, coastal regions tend to be wealthier and more heavily populated than inland ones.
Countries thus have made particular efforts to avoid being landlocked:
The Dubrovnik Republic once gifted the town of Neum to the Ottoman Empire because it did not want to have a land border with Venice; this small municipality was inherited by Bosnia and Herzegovina and now provides limited sea access, splitting the Croatian part of the Adriatic coast in two.
Losing access to the sea is often a great blow to nations:
The creation of the new states of Eritrea and Montenegro, brought about by successful separatist movements, have caused Ethiopia and Serbia respectively to become landlocked.
Austria and Hungary also lost their access to the sea as a consequence of the Treaty of Trianon in 1920. Before, although Croatia had a constitutional autonomy within Hungary, the City of Rijeka on the Croatian coast was independent, governed directly as a corpus separatum from Budapest by an appointed governor, to provide Hungary with its only international port in the periods 1779-1813, 1822-1848 and 1868-1918.
Some countries may have a large coastline, but much of it may not be readily usable for trade and commerce. For instance, in its early history, Russia's only ports were on the Arctic Ocean and frozen shut much of the year. Gaining control of a warm water port was a major motivator of Russian expansion towards the Baltic Sea, Black Sea and Pacific Ocean. On the other hand, some landlocked countries can have access to the ocean through wide navigable rivers. For instance, Paraguay (and Bolivia to a lesser extent) have access to the ocean through the Paraguay and Parana rivers, respectively.
Several countries have coastlines on landlocked seas, such as the Caspian and the Aral. Since these seas are sometimes considered to be lakes, and since they do not allow access to seaborne trade, countries such as Kazakhstan are still considered to be landlocked. (The Caspian Sea, however, is connected to the Black Sea via a canal between the Volga and Don rivers.)
If Armenia and Azerbaijan are counted as part of Europe, then Europe has the most landlocked countries, at 16. Kazakhstan is also sometimes regarded as a transcontinental country, so if that is included, the count for Europe goes up to 17. If these countries are included in Asia, then Africa has the most, at 15. Depending on the status of the three transcontinental countries, Asia has between 9 and 12, while South America has only 2. North America and Oceania are the only continents with no landlocked countries. (Oceania is also notable for having almost no land borders.)
Doubly landlocked
A landlocked country surrounded by other landlocked countries may be called a "doubly landlocked" country. A person in such a country has to cross at least two borders to reach a coastline.