The FAI Cup 2006 was the 86th staging of The Football Association of Ireland Challenge Cup or FAI Cup. This season's competition was the last to be sponsored by Carlsberg. It officially kicked off in late April, when twenty clubs from the junior and intermediate leagues battled it out for the chance to face League of Ireland opposition in the second round. The ten winners of those ties were joined in the second round by the 22 League of Ireland clubs. The competition ran until early December, with the final taking place on Sunday, December 3.

First round

Fixtures played weekend April 23 Waterford Crystal 4-1 Garda AFC Castlebar Celtic 5-1 Fairview CYM Ashtown Villa 2-2 Wayside Celtic Tolka Rovers 1-3 Carrigaline United College Corinthians2-2 Blarney United Brendanville 0-1 Douglas Hall Malahide United 1-1 Fanad United Athenry 0-0 Bangor Celtic Killester United 6-1 St Mochtas Crumlin United 0-0 Avondale United

Second round

Matches played on the weekend of Sunday, 28 May 2006.

Third round

Matches played on the weekend of Sunday, 27 August 2006.

Quarter-finals

Matches played on the weekend of Sunday, 1 October.

Replay

Semi-finals

Replay

Final

The 2006 FAI Cup Final was the last at the old Lansdowne Road.