| Norwegian Football Cup | |
| Year: | 1990 |
| Other Titles: | Norgesmesterskapet i fotball for herrer |
| Num Teams: | 128 (main competition) |
| Defending Champions: | Viking |
| Winners: | Rosenborg (5th title) |
| Second: | Fyllingen |
| Prev Season: | 1989 |
| Next Season: | 1991 |
The 1990 Norwegian Football Cup was the 85th edition of the Norwegian Football Cup. The final took place at Ullevaal Stadion in Oslo on 21 October 1990. Rosenborg were won the Norwegian Cup after they defeated Fyllingen with the score 5–1. This was Rosenborg's fifth Norwegian Cup title.
Below are the dates for each round as given by the official schedule:
| Round | Date(s) | Number of fixtures | width=100 | Clubs |
|---|---|---|---|---|
| 21–24 May 1990 | 64 | 128 → 64 | ||
| 30–31 May 1990 | 32 | 64 → 32 | ||
| 1 July 1990 | 16 | 32 → 16 | ||
| 25 July 1990 | 9 | 16 → 8 | ||
| 15 August 1990 | 4 | 8 → 4 | ||
| 15–16 September 1990 | 2 | 4 → 2 | ||
| Final | 21 October 1990 | 1 | 2 → 1 |
|colspan="3" style="background-color:#97DEFF"|21 May 1990|-|colspan="3" style="background-color:#97DEFF"|22 May 1990|-|colspan="3" style="background-color:#97DEFF"|23 May 1990|-|colspan="3" style="background-color:#97DEFF"|24 May 1990|-|colspan="3" style="background-color:#97DEFF"|30 May 1990|}
|colspan="3" style="background-color:#97DEFF"|30 May 1990|-|colspan="3" style="background-color:#97DEFF"|31 May 1990|-|colspan="3" style="background-color:#97DEFF"|6 June 1990|}
|colspan="3" style="background-color:#97DEFF"|1 July 1990|}
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See main article: 1990 Norwegian Football Cup final.