The Principality of Liechtenstein (German: Fürstentum Liechtenstein) is a tiny, doubly landlocked alpine country in Western-Central Europe, bordered by Switzerland to its west and by Austria to its east. Mountainous, it is a winter sports resort, although it is perhaps best known as a tax haven. Despite this, it is not heavily urbanized (in the way that the Principality of Monaco and Gibraltar are). Many cultivated fields and small farms characterize its landscape both in the north (Unterland) and in the south (Oberland). Not only is it the smallest German-speaking country in the world, but also the only European country whose bordering countries are also landlocked.

Liechtenstein is situated in the Upper Rhine valley of the European Alps. The entire western border of Liechtenstein is formed by the river. Measured north to south, the country is only about fifteen miles (24 km) long. In its eastern portion, Liechtenstein rises to higher altitudes; its highest point, the Grauspitz, reaches 2,599 metres (8,527 ft). Despite its alpine location, prevailing southerly winds make the climate of Liechtenstein comparatively mild. In winter, the mountain slopes are well suited to winter sports.

New surveys of the country's borders in 2006 have set its area at 160.475 square kilometres, with borders of 77.9 km. Thus, Liechtenstein discovered in 2006 that its borders are 1.9 km (1.2 miles) longer than previously thought as more modern measuring methods have been introduced and they measure more accurately the borders in mountainous regions.

Liechtenstein is one of only two doubly landlocked countries in the world—being a landlocked country wholly surrounded by other landlocked countries—the other is Uzbekistan. It is the only country with a predominantly German-speaking population that does not share a border with the Federal Republic of Germany.

Liechtenstein is the sixth-smallest independent nation in the world, by land area. The five independent countries smaller than Liechtenstein are Vatican City, Monaco, Nauru, Tuvalu, and San Marino. See List of countries and outlying territories by total area.

Due to Liechtenstein's small size, the country has been strongly affected by external cultural influences, most notably those originating in the southern German-speaking areas of Europe, including Austria, Bavaria, Switzerland, and the Tyrol. The Historical Society of the Principality of Liechtenstein plays a role in preserving the culture and history of the country.

In June 2003 the state tourism agency decided to give a boost to the country's tourism by offering to rent out the country to businesses and other organizations for conference hosting, weddings, or other such events. The company will be given keys to the capital city and be offered team-building/touristy activities and attractions, such as wine-tasting, tobogganing, and full access to one of the country's royal castles. Liechenstein is a little smaller in area than the capital of the United States, Washington, D.C..

Karl Schwarzler, along with the entire nation of Liechenstein, was awarded the Ig Nobel Prize in Economics in 2003 for this unique enterprise.