Sonderborg is a locality located 195.58 km east-northeast from Copenhagen in Southern Denmark, Denmark. The population of Sonderborg is 27,595 people. Aabenraa, Haderslev, Kolding are located close to Sonderborg. You can find Sonderborg on any map using the following decimal coordinates: 54.9114 (latitude), 9.7867 (longitude).