Rügen (ˈʁyːɡn̩; Rani: Rȯjana, Rāna; Rugia, Ruegen) is Germany's largest island. It is located off the Pomeranian coast in the Baltic Sea and belongs to the state of Mecklenburg-Western Pomerania.
The "gateway" to Rügen island is the Hanseatic city of Stralsund, where it is linked to the mainland by road and railway via the Rügen Bridge and Causeway, two routes crossing the two-kilometre-wide Strelasund, a sound of the Baltic Sea.
Rügen has a maximum length of (from north to south), a maximum width of in the south and an area of . The coast is characterized by numerous sandy beaches, lagoons (Bodden) and open bays (Wieke), as well as projecting peninsulas and headlands. In June 2011, UNESCO awarded the status of a World Heritage Site to the Jasmund National Park, famous for its vast stands of beeches and chalk cliffs like King's Chair, the main landmark of Rügen island.
The island of Rügen is part of the district of Vorpommern-Rügen, with its county seat in Stralsund.