Hønefoss is a town and the administrative center of the municipality of Ringerike in Buskerud, Viken county, Norway. Hønefoss is an industrial center of inner Østlandet, containing several factories and other industry. As of 1 January 2022, Hønefoss had 16,547 inhabitants. Between 1852 and 1964, the town was an independent municipality.

Ringerike is a municipality in Buskerud county, Norway. It is part of the traditional region of Ringerike. The administrative centre of the municipality is the town of Hønefoss.