Numedal is a valley and a traditional district in Eastern Norway located within the county of Buskerud. It traditionally includes the municipalities Flesberg, Nore og Uvdal and Rollag. Administratively, it now also includes Kongsberg.

Eastern Norway is the geographical region of the south-eastern part of Norway. It consists of the counties Oslo, Akershus, Vestfold, Østfold, Buskerud, Telemark, and Innlandet.