Hallingby is a settlement in Ringerike Municipality, in Buskerud, Norway. Hallingby lies at 220 m above sea level, at the foot of the Holleia mountains. It has 891 inhabitants (2025). The nearest city is Oslo, 40 km to the southeast. Among the landmarks around are Hval Church (0.7 km), Sister Churches (22 km) and Kistefos Museum and Sculpture Park (11.5 km). Among the natural features are Hønefossen (11.9 km) and Krokskogen (25 km).