Grossarl (Großarl) is a market town in the St. Johann im Pongau district in the state of Salzburg in western central Austria.

The market town is located in the Grossarl Valley in Pongau, 70 kilometres (43 mi) south of the city of Salzburg.

The sign of the alder shows the big tree clearings in the valley from the 11th to the 13th century.

Some people say that it is also a symbol for the attachment of the inhabitants to the valley and its leaves show many children which were born in Grossarl.

Over the years, many small and medium enterprises settled down in the valley and became important employers for citizens of Grossarl (carpenter, bricklayer and earth-moving companies, etc.)