Liechtenstein is a principality governed under a semi-constitutional monarchy. It has a form of mixed constitution in which political power is shared by the monarch and a democratically elected parliament. There is a two-party system and a form of representative democracy in which the prime minister and head of government is responsible to parliament. However the Prince of Liechtenstein is head of state and exercises considerable political powers.

The Landtag of the Principality of Liechtenstein, commonly referred to as the Landtag of Liechtenstein, is the unicameral parliament of Liechtenstein.