The Kalmar Strait () is a strait in the Baltic Sea, located between the Swedish island of ÃÂland and the province of SmÃÂ¥land of the Swedish mainland. The strait is about long and between and in width.
There is a road bridge across the strait, the ÃÂland Bridge, opened in September 1972.
The areas along the Kalmar Strait have a heritage of Neolithic and Bronze Age habitation. Moreover, Mesolithic people crossed the strait on an ice bridge in the early Holocene period as glaciers began to recede from ÃÂland. A place where early Mesolithic settlement of the island of ÃÂland occurred is Alby, whose people migrated across the Kalmar Strait approximately 6000 BC. They established one of the oldest known Mesolithic villages in Northern Europe.