Hahausen is a village and a former municipality in the district of Goslar in Lower Saxony, Germany. Since 1 November 2021, it is part of the town Langelsheim, of which it is an Ortschaft. It is situated northwest of the Harz mountains, between Seesen and Lutter am Barenberge. It was part of the former Samtgemeinde ("collective municipality") Lutter am Barenberge. == Geography == === City districts === Hahausen Neuekrug == History == === Demographics === As of 30 June 2020 there were 765 inhabitants in Hahausen. == References == == External links ==