Farther Pomerania, Hinder Pomerania, Rear Pomerania or Eastern Pomerania (German: Hinterpommern, Ostpommern), is the part of Pomerania which comprised the eastern part of the Duchy and later Province of Pomerania. It stretched roughly from the Oder River in the West to Pomerelia in the East. Since 1945, Farther Pomerania has been part of Poland; the bulk of former Farther Pomerania is within the West Pomeranian Voivodeship, while its easternmost parts are within the Pomeranian Voivodeship. The Polish term Pomorze Zachodnie ("Western Pomerania") is colloquially used in contemporary Poland as a synonym for the West Pomeranian Voivodship whose borders do not match the historical ones; in Polish historical usage, it applied to all areas west of Pomerelia (i.e. to the entire narrow Pomerania).
Farther Pomerania emerged as a subdivision of the Duchy of Pomerania in the partition of 1532, then known as Pomerania-Stettin and already including the historical regions Principality of Cammin, County of Naugard, Land of Słupsk-Sławno, and with ties to the Lauenburg and Bütow Land. After the Brandenburg-Swedish partition of Pomerania, Farther Pomerania became the Brandenburg-Prussian Province of Pomerania (1653–1815). After the reorganization of the Prussian Province of Pomerania in 1815, Farther Pomerania was administered as Regierungsbezirk Köslin (Koszalin). In 1938, northern part of the dissolved Grenzmark Posen-West Prussia was merged in.
After Germany's defeat in World War II, the region became part of Poland. The population of the area, being German-speaking by large majority, was completely expelled and replaced with Polish citizens, some of whom were expellees themselves as well.
Before 1999, the Szczecin Voivodeship (1945–1998) and its spin-offs Koszalin Voivodeship (1950–1998) and Słupsk Voivodeship (1975–1998) roughly resembled the area of former Farther Pomerania. The Szczecin and Koszalin Voivodeships were merged in 1999 and now constitute the West Pomeranian Voivodeship, while Słupsk Voivodeship was merged into the Pomeranian Voivodeship.