Sem is a village in Asker Municipality, in Akershus, Norway. Sem lies at 228 m above sea level, in the Gausdal Vestfjell mountains. The nearest city is Sandvika, 8.5 km to the east. Beaches nearby: Blakstadbukta (5.4 km), Holmenskjæret (5.3 km), Sjøstrand (8.1 km). Among the landmarks around are Akershus Fortress (19.9 km), Royal Palace (19.8 km) and Oslo Cathedral (21 km). Among the natural features are Voksenåsen (20 km) and Danmark (8.7 km).