Böhmke is a small, uninhabited island that lies between the lakes of Nepperminer See and Balmer See in the southeastern part of the Achterwasser, which separates the large Baltic Sea island Usedom from the mainland of Germany and Poland.

The island belongs to the municipality of Benz in the county of Vorpommern-Greifswald, in the Germany state of Mecklenburg-Western Pomerania.

The island is approximately oval and has an area of 3.2 hectares.

Its highest point lies in the north and is 4.5 metres above sea level (NN), where some bushes also grow.

[1] The southern half consists of marshy grassland.