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

The municipal area is located in the Pongau region within the Central Eastern Alps, on the northern rim of the High Tauern national park.

The Radstadt Tauern mountain range with the source of the Enns river separates it from the Salzburg Lungau region.

The inhabitants mainly depend on winter tourism, but hiking and cycling in summer is also popular.

The Prince-Archbishops of Salzburg had a hunting lodge erected at Kleinarl, which since the mid 18th century serves as a vicarage.