Flag of Aarwangen district, Switzerland Sticker

Aarwangen District is a constitutional district in the northeast corner of the canton of Bern in Switzerland, with its seat at Aarwangen. From 1 January 2010, the district lost its administrative power. Since 2010, it remains a fully recognised district under the law and the Constitution (Art.3 al.2) of the Canton of Berne. Its municipalities became part of the administrative region Emmental-Oberaargau. It is surrounded by the canton of Solothurn on the north, the canton of Aargau on the northeast, the canton of Lucerne on the east, the district of Trachselwald on the south, the district of Burgdorf on the southwest, and the district of Wangen on the west. It has an area of 154 km2 (59 sq mi).