🇩🇪 Alsdorf is a municipality in the district of Aachen, in North Rhine-Westphalia, Germany. Until the 21st century Alsdorf was a mining area, but now many service companies have established themselves in Alsdorf. Alsdorf has an indoor arena, a cinema, a mining museum and a zoo. One of Alsdorf's famous sights is the old Castle.
Alsdorf has a population of over 46,300 people. Alsdorf also forms part of the wider Aachen district which has a population of over 556,631 people. Alsdorf is situated 14 km north-east of Aachen.