1981 Norwegian Football Cup
Lillestrøm won the Norwegian Cup after beating Moss 3-1 on 25 October. The goal scorers for Lillestrøm were André Krogsæter in the 16th minute, Tom Lund in the 32nd minute, and Gunnar Lønstad in the 49th minute. For Moss, Stein Kollshaugen scored in the 89th minute. This was the third time Lillestrøm won a Norwegian Cup. 22 895 spectators attended the game at Ullevål Stadion. The referee was Jan Erik Olsen.
Lillestrøm's winning team: Arne Amundsen, Erik Solér, Frank Grønlund, Tore Kordahl,
Tor Inge Smedås, Bård Bjerkeland, Ole Dyrstad, Tom Lund, Gunnar Lønstad,
André Krogsæter and Roger Sjåstad,Lillestrøm's route to the final
| Round | Date | Home team | Away team | Result |
| 1st round | 28 May | Lørenskog IF | Lillestrøm | 0 - 2 |
| 2nd round | 24 June | Lillestrøm | SK Snøgg | 5-0 |
| 3rd round | 9 July | Strømmen IF | Lillestrøm | 0-2 |
| 4th round | 5 August | Lillestrøm | Rosenborg | 4-2 e.e.t. |
| 5th round | 30 August | Bryne FK | Lillestrøm | 0-1 |
| Semifinal | 20 September | Vålerenga | Lillestrøm | 0-2 |
| Final | 25 October | Lillestrøm | Moss | 3-1 |
| LSK's Norwegian Cups |
| 1977 •1978 •1981 •1985 |
