Posen-West Prussia
Until 1932, the province was subdivided into the government regions (Regierungsbezirk Köslin (eastern part, Farther Pomerania), Stettin (southwestern part, Old Western Pomerania), and Stralsund (northwestern part, ). The Stralsund region was merged into the Stettin region in 1932. In 1938, the Grenzmark Posen-West Prussia region (southeastern part, created from the former Prussian Province Posen-West Prussia) was merged into the province. The provincial capital was Stettin (now Szczecin), the capitals were Köslin (now Koszalin), Stettin, Stralsund and Schneidemühl (now Piła), respectively.