| Irish Cup | |
| Year: | 1942–43 |
| Num Teams: | 12 |
| Defending Champions: | Linfield |
| Second: | Glentoran |
| Matches: | 18 |
| Goals: | 91 |
| Prev Season: | 1941–42 |
| Next Season: | 1943–44 |
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]
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1 Larne were awarded the tie and Distillery were expelled from the tournament for playing an ineligible player in the previous round.
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