Erik Lauritzen

Sønderborg was founded in the mid-13th century around Sønderborg Castle. In 1864 during a Prussian assault on Danish trenches near Dybbøl the city was razed. The Dybbøl Mill, site of heroic Danish resistance, became a symbol of the unity of Denmark. In 1920 Sønderborg was taken by Germany but was returned to Denmark following a referendum on the future of the entire North Slesvig region. 56.2% of the population of the city voted to remain within the bounderies of Germany, while 43.8% voted in favour of ceding to Denmark. Overall, however, the region voted in favour of returning to Denmark by a large margin – nearly 75% to 25%.

Sønderborg is a town and municipality located in the Region of Southern Denmark, near the border with Germany. It is lying on both sides of the narrow Als Sound. It is also a port and seaside resort. In the municipality there are about 75,000 citizens – 28,000 of them live in the city of Sønderborg.

The main goods created in Sønderborg are electronics and agricultural machinery. Sønderborg is home to two of the major industrial companies in Denmark – Danfoss and Linak.  



In Sønderborg you can experience the 250km long coastline of the area, where you can try all kinds of water activities, such as sailing, windsurfing, swimming, and angling or just admire the blue ocean.


Sønderborg Castle

Sønderborg castle is in the centre of the town, and since 1921 houses a museum focusing on the history and culture of the area. The museum is also the home of local and regional history collections spanning from the Middle Ages to the present day. The museum is open all year-round.