Hadsund is a town in the eastern part of Jutland with a population of 4,965. 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.