Ahaus (German pronunciation: [ˈaːhaʊs] ⓘ; Westphalian: Ausen) is a town in the district of Borken in the state of North Rhine-Westphalia, Germany.

Ahaus is the location of one of Germany's interim storage facilities for radioactive spent fuel.

[4]  The lords of Ahaus belonged to the smaller noble dynasties in Westphalia in the wider environment of the Munster bishops.

They got into a fight with them in 1176 when the nobleman Johann von Ahaus gave his castle as a fief to the Archbishop of Cologne.

[4] It was combined by the Bishopric of Münster together with 24 parishes, which extended over large parts of West Münsterland, to form the Amt of Ahaus .