Alsdorf (German pronunciation: [ˈalsdɔʁf] ^ⓘ) 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.

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Alsdorf
Town
Alsdorf Castle
Coat of arms
Location of Alsdorf within Aachen district
Alsdorf Show map of Germany Alsdorf Show map of North Rhine-Westphalia
Coordinates: 50°53′N 6°10′E
Country	Germany
State	North Rhine-Westphalia
Admin. region	Köln
District	Aachen
Subdivisions	16
Government
• Mayor (2020–25)	Alfred Sonders[1] (SPD)
Area
• Total	31.658 km2 (12.223 sq mi)
Elevation	163 m (535 ft)
Population  (2021-12-31)[2]
• Total	47,678
• Density	1,500/km2 (3,900/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
Postal codes	52477
Dialling codes	02404
Vehicle registration	AC
Website	www.alsdorf.de

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Alsdorf is located near the border triangle Germany/Belgium/Netherlands in the west of Germany. Communes bordering Alsdorf are Baesweiler, Aldenhoven, Eschweiler, Würselen, Herzogenrath and Übach-Palenberg. Alsdorf belongs to the district of Aachen.

Today´s city of Alsdorf is a complex mixture of very different ingredients. A part of today's city was a part of the Duchy of Limburg (later united with Duchy of Brabant); and one part belonged to the territory of the Duchy of Jülich.

In addition, Alsdorf consists of ancient settlements whose history dates back to medieval times, as well as settlements that arose because of the long coal mining tradition in Alsdorf. The old settlements are: Alsdorf, Bettendorf, Hoengen, Ofden, Schaufenberg, Warden and Zopp.

The name Alsdorf was mentioned for the first time in a document of the Catholic Church in the year 1191. But it might be much older than 800 years. During its history, Alsdorf changed its affiliation a few times. Along with the duchy of Brabant and the duchy of Limburg, it also belonged to the duchy of Burgundy (1430) and fell to the Habsburgs in 1482. Then in 1555, it became part of the Spanish Netherlands under the Spanish Habsburgs. In 1714, it was returned to the Austrian Habsburgs until the French invasion of 1794. Pursuant to a judgement of the 1815 Congress of Vienna, Alsdorf was awarded to Prussia.

With the reconstruction of Germany after the Second World War, Prussia was eliminated, and its western provinces are now the state of North Rhine-Westphalia, where Alsdorf lies.

Until the middle of the 19th century, farming was the main industry. Only Alsdorf (approximately 1,200) and Hoengen (about 1,400) had more than 1,000 inhabitants. Population in the greater area of today's Alsdorf totalled 4,000 people.

Today the population is more than ten times larger as a result of mining, which came to Alsdorf in the middle of the 19th century. The mining industry needed many workers. First, it was possible to cover the demand with local workers but as the mine grew, the need for workers grew. To be an attractive employer, the mine company built new houses to offer its employees good working conditions. Between 1860 and 1960, a few bigger and smaller villages were founded. These villages are: Begau, Blumenrath, Broicher Siedlung, Busch, Kellersberg, Mariadorf, Neuweiler, Ofden, Ost and Zopp. In 1932, the villages Kellerberg, Ofden, Schaufenberg, and Neuweiler were incorporated and the population grew from 11,500 to 19,711.

The great tragedy on October 21, 1930, demonstrated the danger of mine work. In the Anna II Mine, 270 men and one woman were killed. It was the second largest mining accident in Germany history.

The Maria Mine closed in September 1962, and the last mine in Alsdorf shut down in 1992. Since this time, Alsdorf has successfully changed its image away from a coal city to a modern business location. A few business parks have been founded, where a lot of companies have located.

Alsdorf is divided in 17 districts:

For over a century, coal mining was the heart of Alsdorf's economy. Coal production started in 1849, when the Maria Mine opened in Hoengen. In 1853, production started in the Anna coal mine of Alsdorf. This was the reason for an increase in production and workforce, this was particularly measurable in mine Anna but not in mine Maria, which was closed by September 1962. Unfortunately, the coal crisis has not spared Alsdorf, and the last mine was closed in 1992.

Alsdorf's biggest employer was the Cinram GmbH, with about 2,000^[4] employees in district of Schaufenberg. This company produces up to 2 million DVDs, Blu-rays and CDs daily, exported throughout Europe. The company was founded in 1975 by Warner Music and sold in 2003 to the Canadian stock corporation Cinram International. Customers are well-known record labels and media companies like Warner Music, Twentieth Century Fox and Universal Pictures. In 2017 close down its european manufacturing plant at Alsdorf.^[5]

Besides acquired companies, which either used the closeness to RWTH Aachen University or which saw the favourable location near the borders to Belgium and the Netherlands as advantage.

In June 2022 it was announced that in the first quarter of 2023 Continental the German multinational automotive parts manufacturing company would produce fuel tanks at Alsdorf. A new factory is built by Continental Fuel Storage Systems GmbH. ^[6]

Alsdorf is twinned with:^[7]

• Brunssum, Netherlands (1981)
• Hennigsdorf, Germany (1991)
• Saint-Brieuc, France (1970)

• Peter Heinrich Keulers (1896–1963), journalist and writer
• Herbert Zimmermann (1917–1966), reporter of the legendary radio report of the final match of 1954 FIFA World Cup in Bern)
• Ludwig Schaffrath (1924–2011), sculptor and painter, honorary citizen of Alsdorf
• Hans Berger (born 1938), honorary professor at the University of Applied Sciences Georg Agricola, Chairman of the Mining and Energy from 1991 to 1997, SPD member of the Bundestag from 1990 to 1998
• Helmut Brandt (born 1950), politician (CDU), Member of Bundestag
• Hans-Peter Lehnhoff (born 1963), former football player, including 1. FC Köln, Bayer 04 Leverkusen
• Ralf Souquet (born 1968), billiard champion and gold medalist World Games
• Torsten Frings (born 1976), football player and coach
• Kai Havertz (born 1999), football player

• Kurt Koblitz (1916–1979), SPD member of the Bundestag
• Hans Ferner (1928–1982), SPD member of parliament