Kleinarl is a municipality in the St. Johann im Pongau district, in the Austrian state of Salzburg. It lies in the Alpine region of central Austria, within the federal state whose capital is the city of Salzburg.
Administratively, Kleinarl belongs to the St. Johann im Pongau district, one of the districts (Bezirke) that make up the state of Salzburg. As a municipality, it forms one of the local administrative units of that district.