Sillerup is a village in Haderslev Municipality, in the region of Southern Denmark, Denmark. Sillerup lies at 15 m above sea level. The nearest city is Haderslev, 7.3 km to the southwest. Beaches nearby: Hejlsminde (7.4 km), Knud (5.4 km), Sandersvig (7.2 km). Among the landmarks around are Haderslev Cathedral (7.3 km), Skamlingsbanken (13.2 km) and Koldinghus (22 km). Among the natural features are Knivsbjerg (19.9 km) and Hejlsmindebakken (6.8 km).