| 1986 Norwegian Football Cup | |
| Other Titles: | Norgesmesterskapet i fotball for herrer |
| Country: |  Norway |
| Num Teams: | 128 (main competition) |
| Defending Champions: | Lillestrøm |
| Winners: | Tromsø (1st title) |
| Second: | Lillestrøm |
| Prev Season: | 1985 |
| Next Season: | 1987 |
The 1986 Norwegian Football Cup was the 81st edition of the Norwegian annual knockout football tournament. The Cup was won by Tromsø after they beat Lillestrøm in the cup final with the score 4–1. This was Tromsø's first Norwegian Cup title.
The penalty shoot-outs, instead of replays in the second and third round were introduced because a strike by municipality stadium officials was postponed many first round matches.
|colspan="3" style="background-color:#97DEFF"|28 May 1986|-|colspan="3" style="background-color:#97DEFF"|3 June 1986|-|colspan="3" style="background-color:#97DEFF"|9 June 1986|-|colspan="3" style="background-color:#97DEFF"|10 June 1986|-|colspan="3" style="background-color:#97DEFF"|11 June 1986|-|colspan="3" style="background-color:#97DEFF"|12 June 1986|-|colspan="3" style="background-color:#97DEFF"|Replay: 4 June 1986|-|colspan="3" style="background-color:#97DEFF"|Replay: 11 June 1986|-|colspan="3" style="background-color:#97DEFF"|Replay: 17 June 1986|-|colspan="3" style="background-color:#97DEFF"|Replay: 18 June 1986|}
|colspan="3" style="background-color:#97DEFF"|16 June 1986|-|colspan="3" style="background-color:#97DEFF"|18 June 1986|-|colspan="3" style="background-color:#97DEFF"|23 June 1986|-|colspan="3" style="background-color:#97DEFF"|24 June 1986|-|colspan="3" style="background-color:#97DEFF"|25 June 1986|}
|colspan="3" style="background-color:#97DEFF"|1 July 1986|-|colspan="3" style="background-color:#97DEFF"|2 July 1986|}
|colspan="3" style="background-color:#97DEFF"|30 July 1986|}
|colspan="3" style="background-color:#97DEFF"|27 August 1986|}
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See main article: 1986 Norwegian Football Cup final.