Esterwegen is a municipality in the Emsland district, in Lower Saxony, Germany.
Esterwegen lies in northwest Germany, less than from the Dutch border and about from the sea.
In 2015 the population was 5,280.
The mayor is Heinz Thomes.
In 1933 a concentration camp was established in Esterwegen. In 1936 the camp was dissolved and used until 1945 as a prisoner camp, for political prisoners and later for prisoners of the decree Nacht und Nebel.