Achern (German pronunciation) is a city in Western Baden-Württemberg, Germany. It is located approximately 18 km southwest of Baden-Baden and 19 km northeast of Offenburg. Achern is the fourth largest city in the county of Ortenau (Ortenaukreis), after Offenburg, Lahr / Black Forest and Kehl. As subsequent to the district reform in the 1970s the population passed the 20,000 mark, Achern requested to be awarded the status of Große Kreisstadt. The status was granted by the State government effective January 1, 1974. Achern collaborates with the communities of Lauf, Sasbach, and Sasbachwalden in administrative matters. Besides Achern itself, the municipality includes the boroughs of Fautenbach, Gamshurst, Großweier, Mösbach, Oberachern, Önsbach, Sasbachried and Wagshurst.