The towns of Bisingen, Thanheim, Wessingen, and Zimmern were part of Oberamt Hechingen, a district of the Principality of Hohenzollern-Hechingen and, from 1850, the Kingdom of Prussia. The Oberamt was dissolved in 1925 and mixed with Oberamt Haigerloch into the new Landkreis Hechingen. Over the 1930s, the population of Romani that had grown up in Steinhof to escape persecution in Württemberg was, despite the efforts of local lawyer Julius Klink, expelled. During the later part of World War II, from August 1944 to March 1945, a forced labor camp operated at Bisingen. After the war, Bisingen began expanding dramatically. The town itself grew until the 1970s to the north and east, and politically over the same decade with the merging of Wessingen and Zimmern into Bisingen in 1972, followed by Thanheim in 1974. When Baden-Württemberg reformed its districts in 1973, Hechingen's district was as a consequence dissolved, and Bisingen was assigned to the new Zollernalb district. Bisingen's industrial capacity began expanding in the 1980s, and this growth continued well into the 1990s.