The 1991 Icelandic Cup was the 32nd edition of the National Football Cup.
It took place between 29 May 1991 and 27 August 1991, with the final played at Laugardalsvöllur in Reykjavik. The cup was important, as winners qualified for the UEFA Cup Winners' Cup (if a club won both the league and the cup, the defeated finalists would take their place in the Cup Winners' Cup).
The 10 clubs from the 1. Deild entered in the last 16, with clubs from lower tiers entering in the three preliminary rounds. Teams played one-legged matches. In case of a draw, a penalty shoot-out took place (there were no replays, unlike in previous years).
For the second year running, the final finished in a draw after extra time. In contrast to other rounds, a replay took place. Valur Reykjavik won their seventh Icelandic Cup, and so qualified for Europe.
| Team 1 | Team 2 | Result |
|---|---|---|
| Valur Reyðarfjörður | KSH | 3 - 2 |
| Team 1 | Team 2 | Result |
|---|---|---|
| þrottur Norðfjörður | Huginn Seyðisfjörður | 2 - 1 |
| Huginn Seyðisfjörður | Valur Reyðarfjörður | 5 - 1 |
| Austri Eskifjörður | Einherji | 2 - 3 |
| IK Kopavogur | Dalvík/Reynir | 1 - 2 |
| Völsungur Húsavík | Magni Grenivik | 3 - 1 |
| Kormakur | Neisti Hof | 2 - 0 |
| UMF Skallagrimur | Bolungarvík | 2 - 3 |
| Leiftur Olafsfjordur | Vikingur Olafsvik | 2 - 1 |
| þrottur Reykjavik | Snaefell | 5-1 |
| Reynir Sandgerði | UMF Grindavík (D2) | 0 - 7 |
| Reynir Arskrusfjörður | UMSE-b | 4 - 3 |
| Leiknir Reykjavik | Haukar Hafnarfjörður (D2) | 0 - 2 |
| Sindri Höfn | Leiknir Faskrufjörður | 2 - 1 |
| Arvakur Reykjavik | UMF Selfoss (D2) | 3 - 2 |
| Afturelding Mosfellsbær | Grótta Seltjarnarnes | 1 - 5 |
| Stokkseyri | TBR | 4-2 |
| UMF Njarðvík | Fylkir Reykjavik | 1 - 4 |
| Vikverji | Armann Reykjavik | 3 - 2 |
| IR Reykjavik (D2) | ÍBK Keflavík (D2) | 3 - 2 |
| Team 1 | Team 2 | Result |
|---|---|---|
| þrottur Norðfjörður | Sindri Höfn | 8-0 |
| Einherji | Huginn Seyðisfjörður | 3-4 |
| ÍA Akranes (D2) | Arvakur | 5 -0 |
| UMFS Dalvík | Völsungur Húsavík | 2 - 1 |
| Stokkseyri | IK Kopavogur | 1 - 9 |
| Vikverji | þrottur Reykjavik (D2) | 1 - 4 |
| Bolungarvík | Fylkir Reykjavik (D2) | 0-5 |
| KS Siglufjordur (D3) | þor Akureyri (D2) | 1-6 |
| ÍBK Keflavík (D2) | UMF Grindavík (D2) | 1-0 |
| Kormakur | Leiftur Olafsfjordur (D3) | 0-1 |
| Haukar Hafnarfjörður (D2) | Grótta Seltjarnarnes | 6-3 |
| Reynir Arskrosfjörður | Tindastoll Saudarkrokur (D2) | 1-2 |
| Team 1 | Team 2 | Result |
|---|---|---|
| þor Akureyri (D2) | Tindastoll Saudarkrokur (D2) | 3 - 0 |
| Huginn Seyðisfjörður | þrottur Norðfjörður | 1 - 4 |
| UMFS Dalvík | Leiftur Olafsfjordur (D3) | 3 - 4 |
| þrottur Reykjavik (D2) | ÍBK Keflavík (D2) | 3-4 |
| ÍA Akranes (D2) | Fylkir Reykjavik (D2) | 2- 1 |
| Haukar Hafnarfjörður (D2) | IK Kopavogur | 0 - 1 |
| Team 1 | Team 2 | Result |
|---|---|---|
| IK Kopavogur | Valur Reykjavik (D1) | 1 - 2 |
| Fram Reykjavik (D1) | Víðir Garður (D1) | 1 - 2 |
| Leiftur Olafsfjordur (D3) | þrottur Norðfjörður | 1 - 1 (Leiftur Olafsfjordur win on penalties) |
| FH Hafnarfjörður (D1) | ÍBV Vestmannaeyjar (D1) | 4 - 2 |
| Stjarnan Gardabaer (D1) | KA Akureyri (D1) | 3 - 0 |
| þor Akureyri | ÍBK Keflavík (D2) | 1 - 1 (þor Akureyri win on penalties) |
| Breiðablik Kopavogur (D1) | Vikingur Reykjavik (D1) | 2 - 0 |
| KR Reykjavik (D1) | ÍA Akranes (D2) | 2 - 0 |
| Team 1 | Team 2 | Result |
|---|---|---|
| Leiftur Olafsfjordur (D3) | FH Hafnarfjörður (D1) | 1 - 2 |
| Víðir Garður (D1) | Stjarnan Gardabaer (D1) | 3 - 2 |
| Valur Reykjavik (D1) | Breiðablik Kopavogur (D1) | 1 - 1 (Valur Reykjavik win on penalties) |
| þor Akureyri (D2) | KR Reykjavik (D1) | 4 - 2 |
| Team 1 | Team 2 | Result |
|---|---|---|
| Víðir Garður (D1) | FH Hafnarfjörður (D1) | 1 - 3 |
| þor Akureyri (D2) | Valur Reykjavik (D1) | 0 - 0 (Valur Reykjavik win on penalties) |
| Valur Reykjavik (D1) | 1–1 (a.e.t.) | FH Hafnarfjörður (D1) |
|---|---|---|
Gunnar Mar Mason  79' |
http://www.ksi.is/mot/motalisti/leikskyrsla/?Leikur=192479 (Report) | Horður Magnusson 85' |
| FH Hafnarfjörður (D1) | 0–1 | Valur Reykjavik (D1) |
|---|---|---|
| http://www.ksi.is/mot/motalisti/leikskyrsla/?Leikur=194652 (Report) | Agust Gylfasson 50' |
