Askim is a settlement in Indre Østfold Municipality, in Østfold, Norway. Askim lies at 136 m above sea level. It has 15,629 inhabitants (2025). The nearest city is Ski, 24 km to the west. Among the landmarks around are Skiptvet Church (12.8 km), Akershus Fortress (43 km) and Royal Palace (45 km). Among the natural features are Sarp Falls (34 km) and Lauhøgda (11.1 km).