Lauenburg-Bütow was officially a Polish fiefdom until the First Partition of Poland in 1772. King Frederick II of Prussia had incorporated the territory the year before and the subsequent Treaty of Warsaw in 1773 made the former conditions obsolete. From 1772 on the area was still attached to the Pomerelian lands of part of West Prussia, but in 1777 Lauenburg and Bütow were finally integrated into the Prussian province of Farther Pomerania, and after the Napoleonic Wars from 1815 onwards part of the larger Province of Pomerania. In 1846 it was partitioned into the two Landkreise Lauenburg and Bütow, both parts of the Regierungsbezirk of Köslin.