Aarøsund is an urban Settlement in Haderslev Municipality, in the region of Southern Denmark, Denmark. Aarøsund lies at 10 m above sea level. It has 294 inhabitants (2026). The nearest city is Haderslev, 14.2 km to the west. Beaches nearby: Flovt (3.3 km), Knud (8.2 km), Sandersvig (11 km). Among the landmarks around are Haderslev Cathedral (14.2 km), passage grave of Tonneshøj (2.2 km) and Koldinghus (30 km). Among the natural features are Knivsbjerg (22 km).

Also written Årøsund.