Arnstein is a town in the Mansfeld-Südharz district, Saxony-Anhalt, Germany.

It was formed on 1 January 2010 by the voluntary merger of twelve former municipalities.

The town of Arnstein is divided into twelve localities (Ortschaften),[4] corresponding to the twelve former municipalities which now constitute the town.

Localities of Arnstein Arnstein was created on 1 January 2010 by the voluntary merger of twelve former municipalities in the Mansfeld-Südharz district.

[3] The new unified entity took its name from the old administrative unit of Amt Arnstein in the County of Mansfeld and the Arnstein Castle.