The 1977 Icelandic Cup was the 18th edition of the National Football Cup.
It took place between 31 May 1977 and 11 September 1977, with the final played at Laugardalsvöllur in ReykjavÃÂk. 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, the match was replayed at the opposition's ground.
Valur won their fourth Icelandic Cup, beating Fram in the final. The club therefore qualified for Europe.
|colspan="3" style="background-color:#97DEFF"|31 May 1977
|- |colspan="3" style="background-color:#97DEFF"|4 June 1977
|- |colspan="3" style="background-color:#97DEFF"|7 June 1977
|- |colspan="3" style="background-color:#97DEFF"|13 June 1977
|colspan="3" style="background-color:#97DEFF"|14 June 1977
|- |colspan="3" style="background-color:#97DEFF"|29 June 1977
|colspan="3" style="background-color:#97DEFF"|28 June 1977
|- |colspan="3" style="background-color:#97DEFF"|6 July 1977
|colspan="3" style="background-color:#97DEFF"|12 July 1977
|- |colspan="3" style="background-color:#97DEFF"|13 July 1977
|- |colspan="3" style="background-color:#97DEFF"|14 July 1977
|- |colspan="3" style="background-color:#97DEFF"|19 July 1977
|- |colspan="3" style="background-color:#97DEFF"|26 July 1977
|colspan="3" style="background-color:#97DEFF"|27 July 1977
|- |colspan="3" style="background-color:#97DEFF"|28 July 1977
|- |colspan="3" style="background-color:#97DEFF"|29 July 1977
|colspan="3" style="background-color:#97DEFF"|9 August 1977
|- |colspan="3" style="background-color:#97DEFF"|10 August 1977