 In 1795 Opoczno County was annexed by the Habsburg Empire, and in 1807, it was part of Radom Department of the Duchy of Warsaw.In 1837, the county became part of Radom Governorate of Russian-controlled Congress Poland, and in 1867, Konskie County was carved out of southeastern part of Opoczno County.In the Second Polish Republic, Opoczno County was part of Kielce Voivodeship (1919–39).