Eldest son of Duke Wartislaw IV and Elisabeth of Lindow-Ruppin,[2] Bogislaw had two brothers, Barnim IV and Wartislaw V. The brothers were joint rulers from their father's death in 1326.

They allied with King Casimir III of Poland, whose daughter Elisabeth married Bogislaw, against the Teutonic Order.

Elisabeth died in 1361; in 1362 Bogislaw married Adelheid Welf, daughter of Ernest I, Duke of Brunswick-Grubenhagen.

Bogislaw received most of the Farther Pomeranian parts of Pomerania-Wolgast, thence Pomerania-Stolp (named after the town of Stolp, now Słupsk).

Bogislaw's daughter Elisabeth married the Holy Roman Emperor Charles IV, King of Bohemia in 1363 and he concluded an alliance with his son-in-law in 1370.