Kashubia or Cassubia (Kashubian: Kaszëbë, Polish: Kaszuby, German: Kaschubei, Kaschubien) is a language area in the historic Eastern Pomerania (Pomerelia) region of northwestern Poland. Located west of Gdańsk (inclusive of all but the easternmost district) and the mouth of the Vistula river, it is inhabited by members of the Kashubian ethnic group.