Dillingen (also: Dillingen an der Saar) (French: Dillange) is a town in the district of Saarlouis, in Saarland. It has about 20,000 inhabitants and is divided into the three districts Dillingen-city center, and Diefflen. The city is located on the edge of the Saar-Hunsrück Nature Park at the mouth of the Prims in the Saar and is located about 10 km from the French border. Dillingen is located about 60 km from Luxembourg City and Trier, 50 km from Metz and 30 km from Saarbrücken and is directly adjacent to the urban area of Saarlouis. In terms of population, it is the second largest municipality in the district of Saarlouis. The Dillinger Hütte steelworks is located here.