Lier is a municipality in Buskerud county, Norway. The administrative centre of the municipality is the village of Lierbyen. The municipality of Lier was established on 1 January 1838. The area Åssiden was transferred from Lier to the neighboring municipality of Drammen on 1 July 1951.

Hole is a municipality in Buskerud county, Norway. It is part of the traditional region of Ringerike. The administrative centre of the municipality is the village of Vik. Hole is located around lake Tyrifjorden and extends to the woodland around Oslo. The soil is fertile and suited to growing fruit, berries and other agricultural products.