| Irish Cup | |
| Year: | 1898–99 |
| Country: |  Ireland |
| Num Teams: | 33 |
| Defending Champions: | Linfield |
| Winners: | Linfield (6th win) |
| Second: | Glentoran |
| Matches: | 33 |
| Goals: | 130 |
| Prev Season: | 1897–98 |
| Next Season: | 1899–1900 |
The 1898–99 Irish Cup was the 19th edition of the Irish Cup, the premier knock-out cup competition in Irish football.
Linfield won the tournament for the 6th time and 2nd year in a row, defeating Glentoran 1–0 in the final.[1] [2]
Teams from Belfast, Dublin and the north west of Ireland were given byes in the first two rounds while several Army teams were selected to play in the first two rounds.[3]
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