This is a list of municipality numbers used in Norway.
The numbers originate from 1946, when four-digit codes were assigned to each municipality.
[1] This also applied to municipalities which had ceased to exist at the time.
[1] They were later applied in the ISO 3166-2:NO standard.
On 1 January 2018, the counties of Nord-Trøndelag and Sør-Trøndelag were merged into a new county called Trøndelag.