Mulsum is a village and a former municipality in the district of Cuxhaven, in Lower Saxony, Germany.

It is located on Wurster Landstraße, L129, between Dorum to the north-east, and Wremen to the south-west.

The town is two-and-a-half miles east of the North Sea.

The Land of Wursten, a rather autonomous farmers' republic including Mulsum, had long been claimed by the Prince-Archbishopric of Bremen, until in 1524 it could be definitely be subjected.

In 1648 the Prince-Archbishopric was transformed into the Duchy of Bremen, which was first ruled in personal union by the Swedish and from 1715 on by the Hanoverian Crown.