Sønderborg Municipality in Denmark
|Municipality||since January 2007|
|• Total||496 km2 (192 sq mi)|
|• Density||150/km2 (390/sq mi)|
|Time zone||UTC+1 (CET)|
|• Summer (DST)||UTC+2 (CEST)|
Sønderborg Municipality (German: Sonderburg), is a municipality (Danish, kommune) in Region of Southern Denmark partially on the Jutland peninsula and partially on the island of Als in south Denmark, at the border with Germany. The municipality covers an area of 495.86 km2 (191.45 sq mi), and has a population of 75,264 (as of 2014[update]). Its mayor 2010-13 was Aase Nyegaard from the local list/party Fælleslisten Sønderborg. She was mayor of Augustenborg Municipality 2002-07. Its mayor as of 1 January 2014 is Erik Lauritzen, a member of the Social Democratic party.
Sønderborg's municipal council consists of 31 members, elected every four years. The municipal council has nine political committees. 
Below are the municipal councils elected since the Municipal Reform of 2007.
|2005||15||1||6||1||1||7||31||76.2%||Jan Prokopek Jensen (A)|
|2009||12||1||2||8||2||1||5||69.3%||Aase Nyegaard (L)|
|2013||12||1||2||3||3||9||1||74.1%||Erik Lauritzen (A)|
|Data from Kmdvalg.dk 2005, 2009, 2013 and 2017|
On January 1, 2007, due to Kommunalreformen ("The Municipal Reform" of 2007), the former Sønderborg municipality was combined with Augustenborg, Broager, Gråsten, Nordborg, Sydals, and Sundeved municipalities to form a new Sønderborg municipality. The municipality shares the number one position with Lolland Municipality of being formed through the merger of most former municipalities in the reform of 2007:seven (7). The former Sønderborg municipality covered an area of 54 km2 (21 sq mi), and had a population of 30,555 (2005). Its last mayor was Arne Peder Hansen, a member of the Venstre (Liberal Party) political party.
The site of its municipal council is the town of Sønderborg.
The municipality is home to two of the major industrial companies in Denmark Danfoss and Linak.
Sønderborg Municipality is home to the only officially recognised ethno-linguistic minority of Denmark proper, the North Schleswig Germans. This minority makes up about 6% of the total population of the municipalities of Aabenraa/Apenrade, Haderslev/Hadersleben, Sønderborg/Sonderburg and Tønder/Tondern. In these four municipalities, the German minority enjoys certain linguistic rights in accordance with the European Charter for Regional or Minority Languages.
Sønderborg is twinned with:
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