Results from Norwegian football in 1931. See also 1930 in Norwegian football and 1932 in Norwegian football
Class A of local association leagues
Class A of local association leagues (kretsserier) is the predecessor of a national league competition.
{| class="wikitable"
!League
!Champion
|-
|Østfold
|Lisleby
|-
|Oslo
|Gjøa
|-
|Follo
|Ski
|-
|Aker
|Nydalen
|-
|Romerike<sup>1</sup>
|Lillestrøm
|-
|Øvre Romerike
|Haga
|-
|Oplandene
|Lyn (Gjøvik)
|-
|Glommendalen
|Kongsvinger
|-
|Nord-Østerdal
|Bergmann
|-
|Trysil og Engerdal<sup>2</sup>
|Trysilgutten
|-
|Røyken og Hurum
|Roy
|-
|Øvre Buskerud
|Liv
|-
|Drammen og omegn
|Mjøndalen
|-
|Vestfold
|Fram (Larvik)
|-
|Grenland
|Odd
|-
|Øvre Telemark
|Rjukan
|-
|Aust-Agder
|Grane (Arendal)
|-
|Vest-Agder
|Flekkefjord
|-
|Rogaland
|Stavanger IF
|-
|Hordaland
|Voss
|-
|Bergen
|Djerv
|-
|Sogn og Fjordane
|Høyanger
|-
|Sunnmøre
|Aalesund
|-
|Nordmøre og Romsdal
|Kristiansund
|-
|Sør-Trøndelag
|Ranheim
|-
|Trondhjem
|Brage
|-
|Nord-Trøndelag
|Steinkjer
|-
|Namdal
|Harran
|-
|Helgeland
|Mo
|-
|Lofoten og Vesterålen
|Narvik/Nor
|-
|Troms
|Skarp
|-
|Finnmark
|Kirkenes
|}
- <sup>1</sup>In the following season, Romerike local association changed name to Vestre Romerike.
- <sup>2</sup>In the following season, Trysil og Engerdal local association changed name to Sør-Østerdal.
Norwegian Cup
Final
Northern Norwegian Cup
Final
National team
<small>Sources:</small>