Triesenberg (Swiss Standard German pronunciation: [ˈtriːzn̩ˌbɛrɡ] ^ⓘ) is a municipality in Liechtenstein with a population of 2,636. Its area of 29.69 square kilometres (11.46 sq mi) makes it the largest municipality in Liechtenstein. The center of the municipality rests at an elevation of 884–1,000 metres (2,900–3,281 ft).

Triesenberg was first mentioned in 1378 as "Trisnerberg" (and was called "Triesnerberg" until "Triesenberg" became the official spelling in the 20th century). 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. This dialect is actively promoted by the municipality. 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).