| Irish Cup | |
| Year: | 1919–20 |
| Country: |  Ireland |
| Num Teams: | 11 |
| Defending Champions: | Linfield |
| Winners: | Shelbourne (3rd win) |
| Matches: | 10 |
| Goals: | 15 |
| Prev Season: | 1918–19 |
| Next Season: | 1920–21 |
The 1919–20 Irish Cup was the 40th edition of the Irish Cup, the premier knock-out cup competition in Irish football.
Shelbourne won the tournament for the 3rd time. They had defeated Glenavon in the semi-final, but crowd trouble marred the replay of the second semi-final between Belfast Celtic and Glentoran, and both clubs were subsequently expelled from the competition. Shelbourne were subsequently declared winners of the cup.[1] [2]
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1Following crowd trouble at the semi-final replay at Solitude, both Belfast Celtic and Glentoran were expelled from the competition and Shelbourne were declared winners of the cup.