Stortorget is a public square in Gamla Stan, the old town in central Stockholm, Sweden. It is the oldest square in Stockholm, the historical centre on which the medieval urban conglomeration gradually came into being. Today, the square is frequented by tens of thousands of tourists annually, and is occasionally the scene for demonstrations and performances. It is traditionally renowned for its annual Christmas market offering traditional handicrafts and food.

Gamla stan, until 1980 officially Staden mellan broarna, is the old town of Stockholm, Sweden. Gamla stan consists primarily of the island Stadsholmen. Officially, but not colloquially, Gamla stan includes the surrounding islets Riddarholmen, Helgeandsholmen and Strömsborg. It has a population of approximately 3,000.