 After the war the central and eastern part of Western Pomerania, including Trzebiatów, became part of Poland.The town's German population was expelled, and the town was resettled with Poles, many of whom were themselves expelled from pre-war Eastern Poland, annexed by the Soviet Union.Since 1 January 1999, the town has been within West Pomerania Voivodeship, upon its formation from the former Szczecin and Koszalin voivodeships.