Øvre Eiker is a municipality in Buskerud county, Norway. It is part of the traditional region of Eiker. The administrative centre of the municipality is the village of Hokksund. The old municipality of Eiker was divided into Øvre Eiker and Nedre Eiker on 1 July 1885.
The Old Norse form of the name was Eikjar. The name is the plural form of eiki which means "oak wood". The meaning of Øvre Eiker is "(the) upper (part of) Eiker". (The municipality of Eiker was divided in 1885.)The coat-of-arms is from modern times. They were granted on 24 October 1981. The arms show three silver oak leaves and two acorns on a blue background. The oak is a canting element, since Eik means oak in the Norwegian language.