The 1989–90 Irish League Cup (known as the Roadferry Freight League Cup for sponsorship reasons) was the 4th edition of the Irish League Cup, Northern Ireland's secondary football knock-out cup competition. It concluded on 19 December 1989 with the final.

Glentoran were the defending champions after defeating arch-rivals Linfield 2–1 in the previous final. This season they went out at the quarter-final stage with a defeat to Portadown. Glenavon were the eventual winners, becoming the fourth different winner of the competition in its first four seasons. They defeated Newry Town 3–1 in the final.

1989–90 Irish League Cup

First round

Ballyclare Comrades and Omagh Town both received byes into the second round.

1989–90 Irish League Cup

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Second round

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Quarter-finals

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Semi-finals

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Final

References

1989–90 in Northern Ireland association football

1989–90 domestic association football cups

1989–90

1989–90 Irish League Cup