Achterhoek (Dutch Low Saxon: Achterhook) (literally in English: back-corner) is a region in the province of Gelderland in the Netherlands. It consists of the eastern part of Gelderland, behind the IJssel river, except for the southwestern part, which consists of the region of (De) Liemers. The Achterhoek region borders the Salland and Twente regions (both province of Overijssel) in the north and the German state of North Rhine-Westphalia in the (south)east.
Doetinchem, Winterswijk and Zutphen are the largest towns in the Achterhoek.
These 10 municipalities belong to the Achterhoek region: