Norway is commonly divided into five major geographical regions (landsdeler).
These regions are purely geographical and cultural, and have no administrative purpose.
[1] The first of these new areas came into existence on 1 January 2018, when Nord-Trøndelag and Sør-Trøndelag merged to form Trøndelag.
According to most definitions, the counties of Norway are divided into the following regions (these groupings are approximate): The division into regions is, by convention, based on geographical and also dialectical differences, but it also follows the county borders approximately.
Also Jan Mayen is an integrated geographical body of Norway.