Hasle is a town and a former municipality on the west coast of the Baltic island of Bornholm, Denmark.

The name "Hasle" appears to have originated from Old Danish "hasli", meaning "hazel", and was used in 1335 as the name of the northernmost of Bornholm's four counties (herreder) before being applied to the town in 1546.

The town's location on fertile land next to the sea provided fine opportunities for cultivating vegetables (carrots) and fishing (herring, cod and salmon).

The town is remembered for the role it played in the 17th century when under the leadership of Jens Pedersen Kofoed, a merchant, and Povl Hansen Ancher, the local priest, its citizens helped to free Bornholm from Swedish rule.

[2] During the 17th and 18th centuries various attempts were made to exploit the natural resources in the area, especially coal from around Sorthat and Muleby.