Sønderborg
- 📍 Location: Region of Southern Denmark,
Als and Sundeved, South Jutland - 🌊 Sea or lake: Little Belt, Als Sound and Flensburg Fjord
- 👥 Population (municipality): 74,123 (Jan 1, 2026)
- 🏛️ Founded: grew up around Sønderborg Castle, built before
- 📏 Area: 496.5 km² (land area)
- ⛰️ Elevation: 17 m a.s.l.
- ⏰ Time zone: CET (UTC +1, DST CEST +2)
- 💰 Currency: Danish krone (DKK)
Answers to frequently asked questions
❓ How many people live in Sønderborg?
74,123 inhabitants as of 1 January 2026. Five years earlier, on 1 January 2021, the figure was 73,831, a change of +0.4% (Statistics Denmark, FOLK1A).
❓ Which region is Sønderborg in?
Region of Southern Denmark, Als and Sundeved, South Jutland. The administrative centre of the region is Vejle.
❓ What are the largest towns in Sønderborg?
The largest towns are Sønderborg (28,564 inhabitants), Nordborg (5,661 inhabitants), Gråsten (4,291 inhabitants) (Statistics Denmark, BY3, 1 January 2026).
❓ How many businesses are there in Sønderborg?
3,727 active enterprises in 2024 (Statistics Denmark, GF12, by CVR address), including 153 in hotels and restaurants and 369 in trade.
❓ How large is the area of Sønderborg?
496.5 km² (Statistics Denmark, ARE207, 1 January 2026), about 149 inhabitants per km².
❓ What share of residents live in towns?
About 88% live in towns and villages with at least 200 inhabitants (65,238 people), the rest in rural areas (Statistics Denmark, BY3, 1 January 2026).