2023 Norwegian Fourth Division

The 2023 season of the 4. divisjon, the fifth highest association football league for men in Norway.

Finnmark reverted from their regular/playoff format used last season, but instead Nordland adpoted the format. The 7 teams from Nordland played a round-robin tournament, followed by the top 4 facing each other in playoffs and the bottom 3 doing the same, retaining all points from the regular season. The playoffs were similar to championship rounds and relegation rounds from other leagues, but were named playoff (sluttspill) and placement (plasseringsspill), respectively.