The 1891–92 Irish Cup was the 12th edition of the Irish Cup, the premier knock-out cup competition in Irish football.
Linfield won the tournament for the 2nd time and 2nd year in a row, defeating Black Watch (a British Army team) 7–0 in the final.
[1][2] YMCA, Linfield, Glentoran, Ulster, Cliftonville, Oldpark, Milltown, Lancashire Fusiliers, Ligoniel, Distillery, St Columb's Court, and Limavady all given byes into the third round.