Agger is an urban Settlement in Thisted Municipality, in the region of North Jutland, Denmark. Agger lies at 5 m above sea level. It has 341 inhabitants (2026). The nearest city is Holstebro, 53 km to the southeast. Among the landmarks around are Vestervig Abbey (4.4 km), Hurup Stone (11.3 km) and Lodbjerg Lighthouse (4.6 km). Among the natural features are Ashøj (9.1 km).