Lierbyen is the administrative center of Lier municipality in Buskerud county, Norway. The village is situated on the Lierelva River in the valley of Lierdalen which extends from Drammensfjord north toward Sylling near Tyrifjorden. Lierbyen is located about 39 km from Oslo, about 8 km from Drammen off European route E18. Lierbyen is a part of a greater urban area which also encompasses the villages Lier, Reistad and Kjellstad. The urban area has a population of 4,233 (2007).[1][2][3][4][5]