Buer is a village in Marker Municipality, in Østfold, Norway. Buer lies at 141 m above sea level. The nearest city is Halden, 37 km to the southwest. Among the landmarks around are Fredriksten (37 km), Øymark Church (4.5 km) and Klund Church (14.9 km). Among the natural features are Grimsfjellet (6.8 km) and Galteryggen (10.5 km).