| 1971 Norwegian Football Cup | |
| Other Titles: | Norgesmesterskapet i fotball for menn 1971 |
| Country: |  Norway |
| Num Teams: | 128 (main competition) |
| Defending Champions: | Strømsgodset |
| Winners: | Rosenborg (3rd title) |
| Second: | Fredrikstad |
| Prev Season: | 1970 |
| Next Season: | 1972 |
The 1971 Norwegian Football Cup was the 66th edition of the Norwegian annual knockout football tournament. The Cup was won by Rosenborg after beating Fredrikstad in the cup final with the score 4–1. This was Rosenborg's third Norwegian Cup title.
|-|colspan="3" style="background-color:#97DEFF"|Replay|}
|-|colspan="3" style="background-color:#97DEFF"|Replay|}
|colspan="3" style="background-color:#97DEFF"|25 July 1971|-|colspan="3" style="background-color:#97DEFF"|28 July 1971|-|colspan="3" style="background-color:#97DEFF"|1 August 1971|-|colspan="3" style="background-color:#97DEFF"|Replay: 5 August 1971|}
|colspan="3" style="background-color:#97DEFF"|15 August 1971|}
|colspan="3" style="background-color:#97DEFF"|29 August 1971|-|colspan="3" style="background-color:#97DEFF"|Replay: 2 September 1971|}
|colspan="3" style="background-color:#97DEFF"|3 October 1971|}