Hüttschlag is a municipality in the district of St. Johann im Pongau in the Austrian state of Salzburg.

The settlement is situated in the upper valley immediately north of the Alpine crest, formed by the Ankogel and Hafner mountains of the High Tauern range.

The municipal area comprises the cadastral communities of Hüttschlag proper, Karteis, and See.

The Arla valley was first mentioned about 930 AD, when Bavarian settlers had already superseded the former Slavic population.

Extended smelting works (Hütten) arose around 1520; as a result of miners moving in, Hüttschlag became a centre of Protestantism in the Salzburg lands —many of these Salzburg Protestants were expelled under the rule of Prince-Archbishop Leopold Anton von Firmian in 1731.