Greifswald (ˈɡʁaɪfsvalt), officially the University and Hanseatic City of Greifswald (Universitäts- und Hansestadt Greifswald, Low German: Griepswoold) is the fourth-largest city in the German state of Mecklenburg-Western Pomerania after Rostock, Schwerin and Neubrandenburg. In 2021 it surpassed Stralsund for the first time, and became the largest city in the Pomeranian part of the state. It sits on the River Ryck, at its mouth into the Danish Wiek (Dänische Wiek), a sub-bay of the Bay of Greifswald (Greifswalder Bodden), which is itself a sub-bay of the Bay of Pomerania (Pommersche Bucht) of the Baltic Sea.
It is the seat of the district of Western Pomerania-Greifswald, and is located roughly in the middle between the two largest Pomeranian islands of Rugia (Rügen) and Usedom. The closest larger cities are Stralsund, Rostock, Szczecin and Schwerin. It lies west of the River Zarow, the historical cultural and linguistic boundary between West (west of the river) and Central Pomerania (