Liechtenstein ( (listen) LIK-tn-styne; German: [ltntan]), officially the Principality of Liechtenstein (German: Frstentum Liechtenstein), is a German-speaking microstate located in the Alps between Austria and Switzerland. Liechtenstein is a constitutional monarchy headed by the Prince of Liechtenstein.

Liechtenstein is bordered by Switzerland to the west and south and Austria to the east and north. It is Europe's fourth-smallest country, with an area of just over 160 square kilometres (62 square miles) and a population of 38,749 (in 2019). Divided into 11 municipalities, its capital is Vaduz, and its largest municipality is Schaan. It is also the smallest country to border two countries. Liechtenstein is one of only two doubly landlocked countries in the world; the other being Uzbekistan.

Economically, Liechtenstein has one of the highest gross domestic products per person in the world when adjusted for purchasing power parity. The country has a strong financial sector centred in Vaduz. It was once known as a billionaire tax haven, but is no longer on any official blacklists of uncooperative tax haven countries. An Alpine country, Liechtenstein is mountainous, making it a winter sport destination.

Liechtenstein is a member of the United Nations, the European Free Trade Association, and the Council of Europe. Although not a member of the European Union, it participates in both the Schengen Area and the European Economic Area. It has a customs union and a monetary union with Switzerland.

A principality (or sometimes princedom) can either be a monarchical feudatory or a sovereign state, ruled or reigned over by a regnant-monarch with the title of prince and/or princess, or by a monarch with another title considered to fall under the generic meaning of the term prince.