The 1988–89 Irish League Cup (known as the Roadferry Freight League Cup for sponsorship reasons) was the 3rd edition of the Irish League Cup, Northern Ireland's secondary football knock-out cup competition. It concluded on 30 November 1988 with the final.

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1988–89 Irish League Cup

Roadferry Freight League Cup
Tournament details
Country	Northern Ireland
Teams	32
Defending champions	Coleraine
Final positions
Champions	Glentoran (1st win)
Runner-up	Linfield
Tournament statistics
Matches played	31
Goals scored	120 (3.87 per match)
← 1987–88 1989–90 →

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Coleraine were the defending champions after defeating Portadown 1–0 in the previous final. The same two clubs met in the second round this season, with Portadown knocking out the holders. Glentoran were the eventual winners, becoming the third different winner of the competition in its first three seasons. They defeated arch-rivals Linfield 2–1 in the final.^[1][2]

The final was notable for the Glentoran goalkeeper Alan Paterson, scoring what turned out to be the winning goal.^[3] This was the first time that a goalkeeper had ever scored in a British football final.^[4]