Its area of 29.69 square kilometres (11.46 sq mi) makes it the largest municipality in Liechtenstein.

Triesenberg is noted for its distinct dialect, dating from the influence of Walser migrants in the Middle Ages, who arrived in the region early in the 14th century.

The existence of this dialect is one evidence of remarkable linguistic diversity within the small Principality, as it is spoken alongside the Standard German and Alemannic dialect common to the country.

The municipality includes eight villages: Gaflei, Malbun, Masescha, Rotenboden, Silum, Steg, Sücka and Wangerberg.

Malbun is the only ski-resort village in the country, located not far from the border with Austria (Vorarlberg).