The 1942–43 Irish Cup was the 63rd edition of the Irish Cup, the premier knock-out cup competition in Northern Irish football.
Belfast Celtic won the tournament for the 6th time, defeating Glentoran 1–0 in the final at Windsor Park.
[1][2] [3] 1 Larne were awarded the tie and Distillery were expelled from the tournament for playing an ineligible player in the previous round.