Røysing is a village in Ringerike Municipality, in Buskerud, Norway. Røysing lies at 84 m above sea level, 3.8 km from the Holleia mountains. The nearest city is Oslo, 33 km to the east. Among the landmarks around are Blaafarveværket (31 km), Royal Palace (41 km) and Bønsnes Church (10.1 km). Among the natural features are Hønefossen (5.3 km) and Krokskogen (18.2 km).