Ullerup is an urban Settlement in Sønderborg Municipality, in the region of Southern Denmark, Denmark. Ullerup lies at 37 m above sea level. It has 385 inhabitants (2026). The nearest city is Sønderborg, 10.6 km to the southeast. Near the border: Germany, 11 km. Beaches nearby: Adsbøl (4.2 km), Vemmingbund (8.3 km), Dybbøl (10 km). Among the landmarks around are Glücksburg Castle (16.9 km), Sønderborg Castle (10.5 km) and Nydam Mose (4.6 km). Among the natural features are Schwaneninsel (16.9 km) and Katholm (11.1 km).