Sønstebø is a village in Midt-Telemark Municipality, in Telemark, Norway. Sønstebø lies at 131 m above sea level, at the foot of the Lifjell mountains. The nearest city is Kongsberg, 44 km to the east. Among the landmarks around are Heddal Stave Church (18.2 km), Old Bø Church (2.8 km) and Bø Church (2.8 km).