Bad Iburg (Westphalian: Bad Ibig) is a town in the district of Osnabrück, in Lower Saxony, Germany. It is situated in the Teutoburg Forest, 16 km south of Osnabrück. Bad Iburg is also the name of a municipality which includes the town and four outlying centres: Glane, Ostenfelde, Sentrup and Visbeck. The most important building is Schloss Iburg above the town. It is a complex of a castle which was the residence of the bishops of Osnabrück for six hundred years and a former monastery of the Order of Saint Benedict.