The 1944–45 Irish Cup was the 65th edition of the Irish Cup, the premier knock-out cup competition in Northern Irish football.

Linfield won the tournament for the 22nd time, defeating Glentoran 4–2 in the final at Celtic Park.

[1][2] [3] 1 Glentoran II were awarded the tie as Bangor were expelled from the tournament for an infringement of the rules.