| 1973 Norwegian Football Cup | |
| Other Titles: | Norgesmesterskapet i fotball for menn 1973 |
| Country: |  Norway |
| Num Teams: | 128 (main competition) |
| Defending Champions: | Brann |
| Winners: | Strømsgodset (3rd title) |
| Second: | Rosenborg |
| Prev Season: | 1972 |
| Next Season: | 1974 |
The 1973 Norwegian Football Cup was the 68th edition of the Norwegian annual knockout football tournament. The Cup was won by Strømsgodset after beating Rosenborg in the cup final with the score 1–0. This was Strømsgodset's third Norwegian Cup title.
|-|colspan="3" style="background-color:#97DEFF"|Replay|-|colspan="3" style="background-color:#97DEFF"|2nd replay|}
|-|colspan="3" style="background-color:#97DEFF"|Replay|}
|colspan="3" style="background-color:#97DEFF"|27 June 1973|-|colspan="3" style="background-color:#97DEFF"|28 June 1973|-|colspan="3" style="background-color:#97DEFF"|29 June 1973|-|colspan="3" style="background-color:#97DEFF"|1 July 1973|-|colspan="3" style="background-color:#97DEFF"|4 July 1973|-|colspan="3" style="background-color:#97DEFF"|Replay: 4 July 1973|}
|colspan="3" style="background-color:#97DEFF"|19 August 1973|}
|colspan="3" style="background-color:#97DEFF"|2 September 1973|}
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Strømsgodset's winning squad: Inge Thun, Per Rune Wøllner, Johnny Vidar Pedersen, Tor Alsaker-Nøstdahl, Svein Dahl Andersen, Odd Arild Amundsen, Finn Aksel Olsen, Bjørn Odmar Andersen, Thorodd Presberg, Steinar Pettersen, Ingar Pettersen, Bjørn Erik Halvorsen, Helge Widemann Karlsen and Runar Larsen.