GLUCKSTADT, a town of Germany, in the Prussian prov ince of Schleswig-Holstein, on the right bank of the Elbe, 28 m. N.W. of Altona, by rail. Pop. It was founded by Christian IV. of Denmark in 1617, fortified in 1620, and soon became an important trading centre. In 1627-28 it was besieged unsuccessfully by the Imperialists under Tilly. In 1814 it was blockaded and its fortifications were demolished. In I 83o it was made a free port. It came into the possession of Prussia with the rest of Schleswig-Holstein in 1866.
The inhabitants are chiefly engaged in herring fishery, but have suffered frequent losses from inundations.