Hasle is a town and a former municipality on the west coast of the Baltic island of Bornholm, Denmark. Its population is 1,637 The former mun…Hasle is a town and a former municipality on the west coast of the Baltic island of Bornholm, Denmark. Its population is 1,637 The former municipality covered an area of 115 km, and had a total population of 6,382. It is now included in the municipality of Bornholm. With its pleasant setting, smokehouses, galleries and harbour, the town attracts many tourists.