| Norgesmesterskapet i fotball for herrer | |
|---|---|
| Tournament details | |
| Country |  Norway |
| Teams | 128 (main competition) |
| Defending champions | Lillestrøm |
| Final positions | |
| Champions | Tromsø (1st title) |
| Runner-up | Lillestrøm |
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.