The 2021 Icelandic Cup, also known as Mjólkurbikarinn for sponsorship reasons, was the 62nd edition of the Icelandic national football cup.
[3] A total of 32 teams competed in this round of the competition, with the clubs from the Úrvalsdeild entering at this stage.
A total of sixteen teams competed in the fourth round, with matches played on 26, 27 and 28 June.
[4] A total of eight teams competed in the quarter-finals, with matches played on 15 September.
[4] A total of four teams were competed in the semi-finals, with matches played on 2 October.