The municipality covered an area of 43 km2, and had a total population of 6,290 (2005).
Its last mayor was Jørn Lehmann Petersen, a member of the Social Democrats (Socialdemokraterne) political party.
The municipality was established in 1922 by merging Egernsund and Broager parishes.
It was combined with Augustenborg, Gråsten, Nordborg, Sundeved, Sydals, and Sønderborg municipalities to form the new Sønderborg municipality.
This created a municipality with an area of 499 km2 and a total population of 49,886 (2005).