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.
Glentoran unsuccessfully defended its 1989 title in the quarterfinal losing to Portadown.
Portadown unsuccessfully defended its pursuit of the cup in the semifinals losing to Newry Town.
Newry Town would unsuccessfully defend its pursuit of the title in the final losing to Glenavon, 3–1.
[1][2] Ballyclare Comrades and Omagh Town both received byes into the second round.