| 1980 Norwegian Football Cup | |
| Other Titles: | Norgesmesterskapet i fotball for menn 1980 |
| Country: |  Norway |
| Num Teams: | 128 (main competition) |
| Defending Champions: | Viking |
| Winners: | Vålerengen (1st title) |
| Second: | Lillestrøm |
| Prev Season: | 1979 |
| Next Season: | 1981 |
The 1980 Norwegian Football Cup was the 75th edition of the Norwegian annual knockout football tournament. The Cup was won by Vålerengen after beating Lillestrøm in the cup final with the score 4–1. This was Vålerengen's first Norwegian Cup title.
|colspan="3" style="background-color:#97DEFF"|27 May 1980|-|colspan="3" style="background-color:#97DEFF"|28 May 1980|-|colspan="3" style="background-color:#97DEFF"|29 May 1980|-|colspan="3" style="background-color:#97DEFF"|3 June 1980|-|colspan="3" style="background-color:#97DEFF"|4 June 1980|-|colspan="3" style="background-color:#97DEFF"|5 June 1980|-|colspan="3" style="background-color:#97DEFF"|11 June 1980|-|colspan="3" style="background-color:#97DEFF"|12 June 1980|-|colspan="3" style="background-color:#97DEFF"|Replay: 4 June 1980|-|colspan="3" style="background-color:#97DEFF"|Replay: 5 June 1980|-|colspan="3" style="background-color:#97DEFF"|Replay: 11 June 1980|}
|colspan="3" style="background-color:#97DEFF"|17 June 1980|-|colspan="3" style="background-color:#97DEFF"|18 June 1980|-|colspan="3" style="background-color:#97DEFF"|19 June 1980|-|colspan="3" style="background-color:#97DEFF"|Replay: 25 June 1980|}
|colspan="3" style="background-color:#97DEFF"|3 July 1980|-|colspan="3" style="background-color:#97DEFF"|4 July 1980|-|colspan="3" style="background-color:#97DEFF"|5 July 1980|-|colspan="3" style="background-color:#97DEFF"|6 July 1980|}
|colspan="3" style="background-color:#97DEFF"|6 August 1980|-|colspan="3" style="background-color:#97DEFF"|7 August 1980|}
|colspan="3" style="background-color:#97DEFF"|31 August 1980|-|colspan="3" style="background-color:#97DEFF"|2 September 1980|-|colspan="3" style="background-color:#97DEFF"|3 September 1980|}
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See main article: 1980 Norwegian Football Cup final.