Greater Oslo Region
Greater Oslo Region is a statistical metropolitan region surrounding the Norwegian capital of Oslo, with a total number of inhabitants of 1,954,329 as of 1 January 2025.
The region includes the city proper of Oslo, Akershus and Østfold county, parts of the county of Buskerud, as well as Holmestrand Municipality in the county of Vestfold.
There is also another definition of the Greater Oslo Region, which excludes the Moss and Drammen regions. This definition has 34 municipalities and had a population of 1,323,244 on 1 January 2015.