Mølby is an urban Settlement in Haderslev Municipality, in the region of Southern Denmark, Denmark. Mølby lies at 34 m above sea level. It has 250 inhabitants (2026). The nearest city is Haderslev, 16.3 km to the east. Among the landmarks around are Vejen Art Museum (19.1 km), Haderslev Cathedral (16.3 km) and Ribe Cathedral (32 km). Among the natural features are Knivsbjerg (24 km).