Apeldoorn is a municipality and city in the province of Gelderland in the centre of the Netherlands. The municipality of Apeldoorn, including the of villages of Beekbergen, Loenen, Ugchelen and Hoenderloo, had a population of 165,525 on 1 December 2021. The western half of the municipality lies on the Veluwe ridge, with the eastern half in the IJssel valley.

Gelderland, also known as Guelders in English, is a province of the Netherlands, occupying the centre-east of the country. With a total area of 5,136 km2 (1,983 sq mi) of which 176 km2 (68 sq mi) is water, it is the largest province of the Netherlands by land area, and second by total area. Gelderland shares borders with six other provinces and the German state of North Rhine-Westphalia.