The 1984 Icelandic Cup was the 25th edition of the National Football Cup. It took place between 23 May 1984 and 26 August 1984, 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).