The grand duchy was bounded by the Baltic coast in the north and the Prussian province of Pomerania in the northeast, where the border with the Hither Pomeranian (formerly Swedish Pomeranian) region ran along the Recknitz river, the Peene, and Kummerower See.
The grand duchy was bordered by the Baltic coast in the north and the Prussian province of Pomerania in the northeast, where the border with the Hither Pomeranian (formerly Swedish Pomeranian) region ran along the Recknitz river, the Peene, and Kummerower See.