1998 Norwegian Football Cup
The 1998 Norwegian Football Cup was the 93rd edition of the Norwegian Football Cup and was won by Stabæk after defeating Rosenborg in the final at Ullevaal Stadion on 1 November.
Because of Norway's participation in the 1998 FIFA World Cup, the clubs playing in Tippeligaen entered the competition in the third round.
Calendar
Below are the dates for each round as given by the official schedule:| Round | Date | Number of fixtures | Clubs | New entries this round |
| First Round | 21–23 April 1998 | 35 | 85 → 50 | 70: 16th–85th |
| Second Round | 13 May 1998 | 18 | 50 → 32 | 1: 15th |
| Third Round | 3–4 June 1998 | 16 | 32 → 16 | 14: 1st–14th |
| Fourth Round | 15–16 July 1998 | 8 | 16 → 8 | none |
| Quarter-finals | 5 August 1998 | 4 | 8 → 4 | none |
| Semi-finals | 23 September 1998 | 2 | 4 → 2 | none |
| Final | 1 November 1998 | 1 | 2 → 1 | none |
Fourth round
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Quarter-finals
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