The 1957–58 Irish Cup was the 78th edition of the Irish Cup, the premier knock-out cup competition in Northern Irish football.
Ballymena United won the cup for the 2nd time, defeating Linfield 2–0 in the final at The Oval.
[1] Glenavon were the holders but they were defeated 4–2 by Linfield in the semi-finals.
[2] [3]