| Irish Cup | |
| Year: | 1938–39 |
| Num Teams: | 16 |
| Defending Champions: | Belfast Celtic |
| Winners: | Linfield (20th win) |
| Second: | Ballymena United |
| Matches: | 17 |
| Goals: | 65 |
| Prev Season: | 1937–38 |
| Next Season: | 1939–40 |
The 1938–39 Irish Cup was the 59th edition of the Irish Cup, the premier knock-out cup competition in Northern Irish football.
Linfield won the tournament for the 20th time, defeating Ballymena United 2–0 in the final at Solitude.[1] [2]
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