Hadsund (Danish: [hæðˈsɔnˀ] ) is a town in the eastern part of Jutland with a population of 4,902 (1 January 2026; 5,336 incl. Hadsund South). The town is located by the narrow strait of Hadsund, along an inlet of the Mariager Fjord. It is situated south of the city of Aalborg and north of the city of Randers. The town is a part of Mariagerfjord Municipality in the North Denmark Region. Until 2007, Hadsund was the administrative seat of Hadsund Municipality.
The area has had human presence since at least the Iron Age, though the settlement of modern Hadsund, centred around the ferry connection across the fjord, is first mentioned in 1736.
Hadsund houses multiple educational institutions, including Tech College Mariagerfjord, VUC Hadsund, Hadsund School, and Hadsund Produktionsskole in the area of vocational education. It is also home to a number of companies, including DAVA Foods, Nilfisk, and Bodylab. The western part of the greater Hadsund area is home to the oldest still-existing windmill in northern Jutland, Havnø Mølle, which was built in 1842 and operated until approximately 1927.
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