Brilon [bʁiːlɔn] is a city in the eastern Sauerland. With 26,232 inhabitants, it is the size of a medium-sized town and belongs to the Hochsauerlandkreis in the east of North Rhine-Westphalia. The city is a state-approved air and spa resort. 77.5 km² Forest Brilon one of the cities with the largest municipal forest ownership in Germany.