Måstad is a village in Marker Municipality, in Østfold, Norway. Måstad lies at 125 m above sea level. The nearest city is Halden, 48 km to the southwest. Among the landmarks around are Basmo Fortress (10.8 km), Klund Church (1.0 km) and Øymark Church (12.8 km). Among the natural features are Brattfjell (3.4 km) and Hekollen (8.8 km).