The 2018–19 Northern Ireland Football League Cup (known as the BetMcLean League Cup for sponsorship purposes) was the 33rd edition of Northern Ireland's football knock-out cup competition for national league clubs, and the fifth edition of the competition as the Northern Ireland Football League Cup. This season's League Cup was contested by all 36 clubs of the three divisions of the Northern Ireland Football League. The competition began on 4 August 2018 with the first round, and concluded on 16 February 2019 with the final. The competition was sponsored by McLean Bookmakers.